2012 Prius - CEL P0301 Cylinder 1 misfire/Engine knocking - FIXED

[@elosp70]

That Knocking sound with the Misfire P301, P302...Etc.... is do to a Head gasket, I saw many of this easy fixes on the Prius. I have a 2010 Prius with many miles and saw all this videos and ideas on how to fix the knocking and they are only temporary fixes from taking out the O ring on the reservoir to cleaning the EGR, Cleaning the manifold, and putting on new Spark plugs and Ignition coils. The best thing to do is to change the head gasket before you mess up your valves and engine. The best way you can tell is if your coolant is going down fast and check your oil. If the oil is cloudy you know something is wrong. I fixed my Head gasket and the problem is solved, it is a very large job but very doable. It took me 3 days and about $500.00 in parts.I hope this help many people that love their Prius like I do. Prius Chat helps a lot.

[@Noezen03]

What are the parts you used for HG replacement? Kit from dealer or aftermarket?

[@elosp70]

@@Noezen03 They sell a set at the dealer I think it cost me $250.00 for the Kit not sure but it was approximately there because to get the heads done it was $200.00 and they did it the same day. My Prius is still running without any problems

[@Noezen03]

Thanks, I know I went to the dealer and got the kit. I’m kinda hesitant to do it myself. But I’m asking a mechanic friend and he said he’s gonna do it. Did u somehow included a Oil catch can After ur rebuild? There’s a guide @prius chat by Danlatu. They said it’s to keep the oil build up and to eliminate na future damage of HG again.

[@elosp70]

@@Noezen03 From what I remember I put some oil on the rebuilt Heads after I torqued them if you go to the Prius chat they give you the specs and you could get the torque wrench at Oreilly's they loan it to you so you won't buy it(only used it once) for free of course you leave it a deposit but it is reimbursed. I think the hardest part was lining up the time but it has the arrows to guide you and they don't give you the gasket for the side so you have to use that silicone sealant on the side. You will see it and know what I'm talking about. Good luck and I'm glad saves you a lot of money. just be patient.

[@Darrel-z9c]

Yes thank u very much I was looking into it and you pretty much explained everything spot on makes sense

[@cnoodle7650]

Hope the problem didn’t come back. Mine did the same thing. It was a blown head gasket. Took 2 weekends and 30 budweisers to change it.

[@metrork1]

Sounds like mine when the head gasket blew

[@cnoodle7650]

@@metrork1 Fingers crossed, mine’s not had the problem since I changed the head gasket

[@Jas_01101]

How do you know when it’s a blow. Head gasket?

[@cnoodle7650]

@@Jas_01101 random engine shaking at cold start ups. They became less random though. It shakes because water seeps into a cylinder. Worse in winter when the metal is contracted

[@Jas_01101]

@@cnoodle7650 damn cylinder 3 has coolant inside. Spark plugs were wet with coolant. Supposedly blown head gasket. How common is this? How hard is it to fix?

[@genericman4078]

If you have the same issue, watch your coolant level. If the coolant level drops even after tipping off and you have no confirmed leaks to the outside, it is almost certain that the head gasket is going to fail in a few thousand miles and is leaking coolant into the cylinder(s) causing the misfire codes. I wasted time and money replacing plugs, coils, And cleaning EGR. Still ended up blowing and overheating my engine. The problem manifests itself more during cold weather too.

[@Tuck_Frump]

kzbin.info/www/bejne/i2aThWCeg8l2pNk

[@_cjmccullough]

Needed this so much. Thank you. I’m already $1300 in with the spark plugs, fuel injectors and ignition coils and of course the labor for each of these. But to find out that it’s still not the problem and i should have looked at this video first, I could kick myself.

[@JD-ml7cg]

You could have had the injectors rebuilt for the price of one

[@josegomez6549]

@@JD-ml7cg how do you do that btw

[@JD-ml7cg]

@@josegomez6549 Google it

[@goenitzlopez2076]

Sounds like you got super ripped off dude. Not.a big deal to change out any of those components

[@Tuck_Frump]

This cars head gasket was blown. Keep reading the comments. This solution didn't fix sh*t. It just delayed the inevitable.

[@imthedrivingcrooner]

I loved this video. How you walked us through the problem, how you solved it and how much you spent. Thanks.

[@Tuck_Frump]

This cars head gasket was blown. Keep reading the comments. This solution didn't fix sh*t. It just delayed the inevitable.

[@Tuck_Frump]

kzbin.info/www/bejne/i2aThWCeg8l2pNk

[@imthedrivingcrooner]

@@Tuck_Frump yeah lol I learned that later on after leaving that comment. I had to do a headgasket change and it fixed it.

[@brucewayne2773]

I had the same P0301, engine knocking if I do not drive it overnight . Morning start ups always get a knocking for about 5 to 10 seconds. Ultimately the proper fix was the head gasket issue. Took head to the machine shop , it had some low spots. I also addressed all the things you mentioned in your video.

[@Tuck_Frump]

kzbin.info/www/bejne/i2aThWCeg8l2pNk

[@georgecruz4345]

How much

[@brucewayne2773]

I did the work myself. Head was $100 to get it decked and checked out. @@georgecruz4345

[@davidw.7275]

Oh my gosh this is EXACTLY what my Prius has been doing. Thank you so much for this video man

[@Jason1904]

me too bro, lmk if you get yours fix and how it runs after. I'm about to do mine this week. Hopefully it will be good after. GL

[@iuriirudov]

The same thing on mine 2012 Prius at 133k miles. About to replace the spark plugs first. Thanks for the helpful video. Updated: finally it was a bad fuel injector. I found it by swapping them.

[@davidw.7275]

Iurii Rudov 2011 with 125k on mine. I guess Toyota recommends the spark plugs be changed after 120k? So that’s what I’m going to try next.

[@davidw.7275]

Jason Win what did you have done to yours? I tried taking mine to the dealer with a clear recording of the sound. Mine did this three times on cold start but since there was never any error codes or warning lights on the car there was nothing on the computer for them to check. My suspicion after watching a few other videos is that I need spark plugs. But how is yours running now? Did yours make that noise a lot or just now and then?-mine was about once a month since January.

[@darrylhowe1465]

In the description, you claim to have fixed the severe engine knocking; however, I noticed that 2 months later you posted a video where the severe engine knocking is still present. Perhaps you should edit this to let people know that this did not actually "fix" the severe engine knocking.

[@Austinlolwut]

That knocking can be caused by various misfires. So it could later have been headgasket failure or something else.

[@ashlaunicaalpari4584]

I got a severely aggressive engine shake with a P0301 misfire code at around 40-50 MPH on the way home with a new to me vehicle. The fix was a couple things: Someone stupid had been running 10 + quarts oil when vehicle is spec’d as a 5.9qt requirement. They hadn’t changed oil in a very long time. Lots of sludge had built up and caused a valve to be sticking. Spark plugs had also been oil fouled. Nothing an oil change, little Seafoam and new spark plugs couldn’t fix 😂

[@briiigiiijaureguiii]

GOOD JOB DUDE!!! Mine is hard shaking though prefers reverse and stood being crazy after about a minute. SUPER helpful. Very much appreciate you.

[@Tuck_Frump]

This cars head gasket was blown. Keep reading the comments. This solution didn't fix sh*t. It just delayed the inevitable.

[@Tuck_Frump]

kzbin.info/www/bejne/i2aThWCeg8l2pNk

[@briiigiiijaureguiii]

@@Tuck_Frump gotcha. Much appreciated... I came to find it was my soak plugs. Switched them out a few weeks ago. So far so good😁

[@marshallgoldberg8376]

If you ever have a misfire on one cylinder, simply switch the coil packs and see if the error moves with the coil.

[@edgallegos]

Great video. Clear, concise and helped me save money. Thank you!

[@Tuck_Frump]

This cars head gasket was blown. Keep reading the comments. This solution didn't fix sh*t. It just delayed the inevitable.

[@devoidbmx1]

If you take a pressure washer (just go to your local car wash if you dont have one) you can clean out the EGR cooler in about 10 minutes. Easiest fastest way to go.

[@SeanOGO]

How

[@Bigman74066]

I did an article on this on Prius chat. In my case the EGR pathways in the inlet manifold where blocked by soot. Only the 1st was still open. This caused the 1st cilinder to get all of the EGR gases and it started to misfire because of it... Solution: clean the EGR pathways in the inlet manifold.

[@claudebradley5381]

My EGR pathways were clogged also. Replaced the EGR valve first with exhaust gas cooler cleaned but didn't help the shuttering while driving, misfire. Replaced the intake manifold with new one and it runs great now!!

[@terrytorres7075]

@@claudebradley5381 how much that cost? I'm hoping that isn't my issue.

[@frmf]

@Brigman74066 do you have the link of your Prius Chat article ?

[@WillThat]

My wife was having this severe shaking and misfire cylinder 1 in her CT200H(same drivetrain), internet said it was the EGR. It ended up being the headgasket which bent rod #1. The local mechanic wanted $5000 to replace the gasket and Lexus wanted to replace the engine at the cost of $6500. I ended up doing it myself for about $230.

[@realrandomcarstuff]

William Decoteau are you a mechanic?

[@WillThat]

@@realrandomcarstuff no

[@realrandomcarstuff]

William Decoteau wow. How long did that take? Had you done a head gasket before?

[@WillThat]

@@realrandomcarstuff the car was out of commission for about a week because I took the engine apart then ordered parts, but it was maybe three days of actually working here and there. This was my first time pulling an engine and tearing it apart. It was pretty straight forward though. It's a common issue on these cars and there's a few well documented fixes to follow along.

[@SurferTy]

@@WillThat This is awesome! I did my spark plugs, fuel injectors, Now my ERG is in pieces in the garage. If that doesnt work. I think I will do the head gasket myself. And I am kind of excited. My wife thinks I am crazy. I think $4,000 of work on a $12k car is crazy.

[@devoidbmx1]

I just did all the intake manifold and EGR system clean at 100,000 miles on my car as a preventative maintenance job. That clip that is hard to remove took me about 1 hour. I watched a gasget masters video and they ripped it upwards, took under one second to remove. Made me feel like a fool! The underside nut on the EGR cooler didnt go back in on my car as that was a huge pain to remove. I also installed an oil catch can. Fingers crossed I dont have any engine knocking in the near future.

[@RobertoRamirez-sv2fs]

Need some help I cleaned out the EGR valve and also the manifold but once installed engine started shaking what can I do

[@unclejay9205]

These are the least of his problems. I did two prius already, my brothers and mine and both times it was the headgasket needing replaced as well as cleaning the egr, egr cooler and intake manifolds tiny port holes.

[@skorpyo331]

I remember every once in a great while on cold startup in the morning I would hv shaking goin on. And then I wondered what if I wait for engine to shutoff (and not while its running) at end of day before pushing button to off. Ever since then I hvnt had any rattle.

[@NYCMP1]

Thanks for sharing your repair experience. It will be very helpful when I do mine this week. Thanks again and happy Easter 👍

[@metrork1]

Use a good head gasket from Felpro

[@user-wr5cc9op6r]

I did same a while ago car stared shaking changed spark plugs and did the clean up took me 2 hours to do it and now my car has 280k miles and works very smooth

[@Tuck_Frump]

kzbin.info/www/bejne/i2aThWCeg8l2pNk

[@tommycortez_]

There is moisture or blow by oil getting into that cylinder , you need to check thatcylinder or have a compression check on all that cylinders. So that is the first thing to check. One of the things that have helped is cleaning out the egr pipe then adding a filtered oil catch can between the PCv valve and the intake manifold. You should clean out your intake manifold it probably has a lot of oil in it. I have high miles and changed out the head gasket and added a filtered oil catch can , I use 3 quarts of 0w20 and between oil changes I use lucus oil stabilizer , that helps with worn piston rings and oil consumption. The car no longer shakes during cold startup , no coolant loss. You can get a cheap iPhone boroscope to look into a suspected cylinder before you start up in the morning and look to see if it’s oil on the piston or coolant. Sometimes people would unpressurized the coolant system by slightly losing up the cap and selling a Prius with a bad head gasket. It will have min coolant loss and you wouldn’t notice until you drive on a hot summer day. You won’t suspect it in the cooler weather. Hope this helps somebody. My car had 223000 miles when Cylinder 2 was misfiring then I notice loss in coolant and the coolant cap was never tight or had the o ring missing. These Prius are known for burning oil because of the pcv design causing engines to start to blow head gasket and fail. There is a lot of info on priusprime forum about the 3rd gen Prius and adding a filtered oil catch can , just google it.

[@golfish8589]

How does a pad PVC system cause blown head gaskets? Thanks...

[@tommycortez_]

TIM Flugaur-Leavitt The pcv valve is letting blow by gasses into the intake manifold , which is normal , but when you have worn down parts , like piston rings , this is letting more oil in your intake manifold , past the pcv valve and just sitting in your intake manifold, when you start the engine it will suck in this oil stuck in your intake manifold and shake the engine so hard that I believe hurts the head gasket or wears it down. I haven’t had a hard knocking start in the winter or summer since I installed a filtered oil catch can, I got the information from Priuschat forum. Here’s a link, in my opinion I probably need new piston rings , I have not done a compression test , but I now burn a quart of oil every 600 miles. priuschat.com/threads/oil-catch-can-eliminate-that-knock.179588/

[@thomassavage527]

I put Lucas fuel system cleaner in every fill-up....108000 miles...no oil consumption.

[@vando1267]

Great video! Highly recommend installing an oil catch can. This will reduce the amount of oil being recirculated back into the intake manifold and clogging EGR valve and cooler. Every time I change the oil in my Prius (every 5k miles), there is at least 3-4 tablespoons of oil/fuel caught in the oil catch can. Might want to also change your spark plugs when doing this. Some of my plugs were fouled due to the excess oil being sucked back into the intake manifold and into the intake runners. Oil catch can will reduce that from happening too.

[@realrandomcarstuff]

Do you have a recommendation for one? One that's easy to install and empty out?

[@vando1267]

Seahawk Guy I used the one recommended from this Nutz About Bolts video. kzbin.info/www/bejne/h3uXiWB_h6eBjLs. Pretty cheap and available on Amazon. I also added a metal scouring pad inside the catch can to serve as an extra filtration medium to catch more of the oil and fuel from the PCV valve.

[@Tuck_Frump]

This cars head gasket was blown. Keep reading the comments. This solution didn't fix sh*t. It just delayed the inevitable.

[@MrPhotodoc]

That EGR system is a bear to do but it will save you hundreds to do it yourself. Another thing is to check your coolant level closely and often as well as the oil level. Over full will suck oil back into the manifold and EGR causing the same problem. The bonus is you will be a Prius genius after you're done.

[@louierodriguez9880]

This video is helpful and it is not a 'how to" video; it is a "what I did" video.

[@realrandomcarstuff]

Louie Rodriguez yes. That was the intention and why I did not include many of the steps I did as they are already detailed in the how to videos I included in the description. I just wanted to give some ideas for people to look at as they troubleshoot their issues.

[@louierodriguez9880]

Seahawk Guy. Nevertheless, I’m grateful to you for the video. Thank you!

[@louierodriguez9880]

I have a 2012 Prius that was rattling and lately smoke came out of the tailpipe. I drove it and head a bang and the engine stopped running; car was stuck on side of road. When I pushed the start button the dashboard lights came on but would not go into gear and engine stays off; it goes from Park to Neutral. Had it towed home until I have time to analyze. Bought a 2017 meanwhile. Any similar problems with anyone? Thank you!

[@bobbylopez77]

Great video. Unfortunately I have tried everything, manifold cleaning, new spark plugs, coils, cleaned EGR...even got a MAP sensor swap....still getting the "death rattle". All signs point to the head gasket. I saw another video that showed if you get a long pressure sound when you open your coolant reservoir, it's a head gasket issue. I suppose that's where I'll go next! 2013 Prius V 185k miles.

[@jafinch78]

Yep, super common.

[@dublinvids5146]

Link to that video? Cheers, as. I have that.

[@bobbylopez77]

Sorry, I didn’t take a video of that. I got rid of the car. Sucks because I actually really liked that car, but it was basically dying.

[@sriss1414]

Very good video thank you! Does it result in HG blow?

[@jameselam8407]

Head gasket sealer, cleaning the EGR valve, and the EGR ports cured my engine shakes. Runs like new.

[@betheiess5492]

Thanks for the detailed explanation!! I’n having the same issue and have gotten as far as changing out the cyl 1 coil, and still have the problem. I’m gonna have at this and see if I can’t get this done before my car appointment in a week. Great job!

[@johnnywang206]

Beth Eiess if you switch spark plugs to test, see if u can see coolant inside the cylinders

[@betheiess5492]

Will do. Also saw another video in which the guy said oil overflow got down into cyl 1 as well, and this started going right after I (too carelessly) added oil. It’d be lovely if that’s all it is, but since you cleaned the manifold, figgered I’d get at that while I’m at it, because mine drinks oil like cheap beer. Do you know anything about that/if a lot of oil consumption is normal? Mine is 2010, lotsa (180k+) miles.

[@betheiess5492]

I’ll also check out the head gasket vid. Thanks again!

[@johnnywang206]

@@betheiess5492 Mine was burning about 1 quart every 5000 miles, instead of adding a quart, I just started doing oil changes every 5k instead of 10k

[@gasketmasters]

Beth Eiess it’s the head gasket. Always is

[@Finny7654]

I have a 2012 Prius with 260,000 with exact same noise. I tried almost everything. Nothing worked. Until, I saw a video regarding the fuel injectors. I pulled them, had them cleaned. That was it. Problem solved. Try this first, before spending more money. I couldn't believe how easy it was to fix this yourself. Try it!!

[@metrork1]

Still pull the number one spark plug and look for coolant in cylinder

[@sbotthaus]

Priuses are known to have that EGR issue. Best to replace the EGR and the intake. Cleaning is a pain, but depends on your budget of course. Toyota actually had a TSB and recall for a while on the EGR

[@siward44]

I have the same engine knocking symptoms on my 2012 Prius. The knocking only happens occasionally especially after short trips. I hope it isn't a head gasket problem. I will keep driving the car until the symptoms get more severe.

[@humninbird40]

@drew michael thank you I just had Toyota diagnostic test done and they want 4000 to replace the gaskets. My car has this same exact sound. But not as bad. It just started

[@humninbird40]

@drew michael UPDATE..6/14/20. It was a leaky head gasket 3,811.89 bucks later, Toyota fixed it and back on the road hopefully I'll get another 100.000 miles. If your car is making this noise 99.9 % it's a gasket. Get it fixed asap. Thank you all for your advice and suggestions

[@calvaryassemblyofgodsouthi8046]

humninbird40 I don’t anticipate putting big money like that into this car. At almost 200,000 miles I will be due for new hybrid batteries and EGR work and water pump and alternator and whatever else Murphy throws at us. It’s being used as a backup car for local road trips and that’s fine with me.

[@calvaryassemblyofgodsouthi8046]

humninbird40 How many miles on your car now?

[@humninbird40]

@@calvaryassemblyofgodsouthi8046 139.000 .

[@tonykilbourn7812]

Good job on maintenance but looks like Coolant level is low... at 10:41 ... it’s weeping into cylinders...boroscope will show it, just hard to get to spark plug hole...do a simple head gasket job and install oil catch can of some sort... still bad design by Toyota. But still runs 400K +...when you start it -not neutral but put in drive or reverse will alleviate shutters and knocking till fixed

[@paulrichards7587]

I’ve only just watched the video so many just found it on KZbin. I had the same problem and you know what mine was. I had a replacement engine on the back of the coolant I’ve got them studs nuts. The studs was banging on the coolant at the back of the top, one where the the first stud nose loosened it and re-tightened it up again it’s fine now but I would like to know is Sid I think you’re holding up what are used to poke the coolant with what are they called?

[@noenavanava5386]

You should have recorded the dismantling process would have been great but thanks for the video

[@realrandomcarstuff]

noe nava nava if you check the description I linked the video of the guy who goes step by step on how to do all this.

[@tonyphouanenavong5626]

Excellent video. I thought I was the only one with this problem.

[@Tuck_Frump]

This cars head gasket was blown. Keep reading the comments. This solution didn't fix sh*t. It just delayed the inevitable.

[@kamal5341]

Can the coils be cleaned?

[@leandrosalesadorador]

Olá... Sou brasileiro e seu vídeo me ajudou muito pois meu prius estava com o mesmo problema. Muito obrigado 👏🏽👏🏽👏🏽👏🏽👏🏽

[@Tuck_Frump]

kzbin.info/www/bejne/i2aThWCeg8l2pNk

[@leandrodemelo3234]

Estou com esse problema. Oque você fez?

[@leandrosalesadorador]

@@leandrodemelo3234 cara durou pouco tempo e tive q fazer o cabeçote do motor. Vai aí em média 1300 dólares. Boa sorte

[@RausterMoura]

Opa amigo brasileiro também , o carro tremia cedo ou em marcha lenta, você limpou a válvula EGR e o coletor de admissão ou só fez a junta do cabeçote ??

[@leandrosalesadorador]

@@RausterMoura rapaz eu andei com o motor até ele acabar e no final tive que trocar o motor porque fazer o cabeçote não daria mais jeito. Comprei um novo motor porque a mão de obra é o mesmo valor

[@freddiervz2158]

My Prius gave me 300k until I need it to do mejor repairs.

[@vuhuynh702]

do you do any basic maintain up to 300k miles?

[@amazoidal]

Probably wasn't a problem-prone GEN 3.

[@DarkstarDarth]

@@amazoidal …my gen 3 with 188k runs smooth a silk. Changing oil every 5k with Mobil one is helpful.

[@metrork1]

@@DarkstarDarth When the EGR cooler becomes plugged there goes your head gasket

[@Buff_Dave_Oprtr]

My daughter is currently at 242,797. Lol

[@larryrichardson7797]

Really well done! thank you!

[@Tuck_Frump]

kzbin.info/www/bejne/i2aThWCeg8l2pNk

[@blakeposter7496]

id you take video or pics of how clean you got the cooler before reinstall?

[@davidhinton3595]

You had the plugs changed 30K ago so you "knew" they couldn't be the issue. Without visibly checking the plugs you cannot be sure. I once had a misfire that was caused by a piece of carbon getting jammed between the spark plug tip and the side electrode. Removal of the carbon fixed it!

[@carterjmccarthy]

So it wasn't the head gasket and this fixed the issue?

[@Juss-Saiyan]

I have no idea if it was the fuel injection or the egr....what was the solution??

[@MrJustinbn]

I don't have engine indicator warning. But my knocking sound is terrible and car has lost total power and seems to move forward or backward at a very very slow speed. I tried replacing transmission oil and it does not solve the problem. I Almost going to replace the gearbox but in the end I told my workshop to try replacing ignition coil , Sparkplugs and the problem was solved.

[@SurferTy]

Did you clean the EGR? This gets clogged up. choking the air

[@MeganChic]

I started using 93 Octane gas and changed the spark plugs and that fixed the problem.

[@metrork1]

will not fix a blown head gasket

[@MeganChic]

@@metrork1 The problem isn’t a blown head gasket in my case. I did a compression check on all four cylinders to confirm. Turns out the EGR valve was clogged with carbon.

[@reocam8918]

@@MeganChic it's still good to unclog the egr system. Your high quality gas will not remove the gunks

[@louisskoubye9494]

Did this work or did you end up having to replace a head gasket? I'm asking because mine just started to do this...

[@realrandomcarstuff]

Head gasket.

[@wanntanna]

Hey Seahawk! I know its been almost 3 years since this post. Did any of the knocking on engine start-up return in the months after doing all this? Reason I asked is because later discovery of the P0301 Cylinder misfires might have something to do with a bad head gasket.

[@dannys69]

did you figure it out

[@malikujkhussain6301]

Grate job buddy thanks for your information and vedio I have the same issue with my car 🚗 👍

[@rickhavu]

Thanks for the info as I am currently trying to remove the EGR cooler. I wasn’t real excited about removing the hex studs from the back. The bottom one is not that easy to get to as well but at least there is only that one and the top one! I have Purple Power and gas to soak it in, not sure which one will work better.

[@Tuck_Frump]

This cars head gasket was blown. Keep reading the comments. This solution didn't fix sh*t. It just delayed the inevitable.

[@lyzoh7700]

Heat shields were loose on my 2010 fixed the problem

[@metrork1]

That kind of shaking will not come from loose heat shields

[@bobbauvian7700]

where did you get your ignition coils for $77? is that for all 4?

[@realrandomcarstuff]

Amazon. $77 for 4

[@reocam8918]

@@realrandomcarstuff but check the comments, not perfect deal. Dealer sold those around 100bucks.

[@claytondelanie]

You indicated putting it in neutral stopped the rattling. But was the engine running anyway?

[@realrandomcarstuff]

yes, the engine was running. But that wasn't the solution. I was just trying to figure out what was causing the issue. The root cause was the head gasket was bad. You need to change the coolant regularly so the engine is cooled down or else the head gasket will fail

[@Not_Sure_]

Check the coolant level. If the coolant level is getting low, the coolant is leaking into one of the cylinders. They usually develop a blown head gasket. :( I've had the same problem with my Prius.

[@21boxhead]

WELL IT LOOKS LIKE THE COOLANT RESERVE TANK IS FULL THAT'S A GOOD SIGN

[@RobertBeedle]

I strongly advise anyone doing this to replace the EGR valve instead of just cleaning it.

[@Jas_01101]

My 2010 Prius just started knocking. Check engine light turned on. It has 170k miles. Damn mine does exactly the same thing. Cylinder 3 is misfiring. Any input?

[@hammoudihoussam58]

what is the name of that key please !

[@Bill-NM]

Let me get this straight...there's an EGR valve, and EGR cooler, and an EGR pipe? And from comments, it sounds like perhaps just cleaning the EGR valve may fix the problem? (We already had the intake replaced...that did not fix the problem...the mechanic said the cooler and valve/whatever were NOT dirty...hard to believe, but I believed him figuring he actually laid eyes on them...but maybe he didn't.) Thanks...

[@realrandomcarstuff]

William Salopek those three pieces make up the EGR system. U can only see if the pipe is dirty easily. The other two u need to dismantle to see for yourself. I don’t know how many miles u have but that cooler and valve will totally clog up with carbon if it’s not cleaned

[@Bill-NM]

@@realrandomcarstuff 225k miles...the problem just started a few days ago. We bought the car with 99k miles 5 years ago...I doubt the EGR system was ever cleaned, but I can't be sure. The local garage, who I trust, after reading the code (cylinder 1 misfire, multiple cylinder misfire) replaced the spark plugs (which they said were in very bad condition), and when that didn't fix it, replaced the intake manifold as per Toyota guidlines (but I think that's about cold morning condensation and water in the system)...so we are about $1300 in at this point. I had mentioned to them that I read about carbon build up, the EGR clogging issues, etc, and they said they looked and they were clean. ? So I wonder if they really ever ACTUALLY looked? I have a call into them now...when they call back, I'll dig deeper as to whether they actually LOOKED at the pipe, and request they tear it all apart again to do the cleaning, as I imagine with 225k miles, there is simply no way that system isn't clogged...do you agree? Thanks for your help.

[@realrandomcarstuff]

William Salopek you should not spend any more money on it replacing things until you know for sure. The first thing they should test for is the head gasket and see if it’s blown. If it’s still intact then you should clean the EGR, replace the water pump and coolant. It could be you have coolant leaking into cylinder 1. You can watch my K-Seal video and see if that solves your problem. If it does then your head gasket is done and you should just get rid of the car. The amount of repairs on a car this old is not worth it at this point.

[@Bill-NM]

@@realrandomcarstuff On our first visit to the shop, about 2-3 weeks ago, I asked them specifically to check for head gasket issues, and they said "absolutely" the head gasket is OK...that said, I don't know how they determined that. Why are you saying to replace the water pump and coolant? I have an appt for Monday where they said they will reinspect the EGR system for clogging (for free)...so we'll go with thatfor nowand see what happens. So you are saying that even with a good head gasket, that collant can be leaking into cylinders? Thanks...

[@realrandomcarstuff]

William Salopek the head gasket replacement is $3500. It usually fails due to overheating. The water pump is electric so if it fails u usually won’t know. The water pump is $220. Cheaper to just replace it and know it’s good than to squeeze every bit of use out of it and risking your head gasket. Even if they say the head gasket is good, I would try the K-Seal and see what happens. U can do it right now and know in the next few hours if your issue is a coolant leak. But you definitely need to clean out your EGR. I have not talked to anyone who at 200k did not have a clogged cooler and valve

[@lilianna6094]

this is what my moms car is doing but its leaking a TON of fuel when she starts it … could it still be a blown head gasket, or is it a fuel leak or what is it????

[@allisonspringer8152]

Probably would want to fix the fuel leak first. Fuel leaks could definitely cause a miss fire

[@jonvitrano8394]

This same knocking is happening to my 2014 with 225k on it. Knocks at start and sometimes from stopping when the engine kicks back on. Egr was SUPPOSEDLY cleaned this year at a shop. Replaced plugs and nothing besides running a little better. I drive is hundreds of miles a day some days and thousands a month. No other engine issues have come up. Check engine has been coming on for misfire cylinder 2 but seems to resolve itself. Any tips? Bringing to the mechanic tomorrow.

[@johnnywang206]

Is your coolant level dropping? It’s probably leaking into the engine via the head gasket.

[@jonvitrano8394]

@@johnnywang206 Will find out today at the mechanic. Didn't use the car all weekend and it didn't shake with cold start or have any issues driving 15 mins to the mechanic.

[@jonvitrano8394]

@@johnnywang206 mechanic is saying the engine shaking is coming from the transmission. Hmmmm

[@amansagoo1]

i had the same issue but turn out to be Head gasket was leaking

[@mmoon1860]

I have done the same and no more rattling sound in the morning and that was bad all the pipes almost blocked now all cleaned Do CHANGE PVC it’s needed

[@JavierHernandez-ji3ol]

Great video, thanks for the reply

[@igorl8367]

you didn't have to drain the oil or coolant, correct?

[@realrandomcarstuff]

Would have been easier to drain the coolant. Wouldn’t have needed to clamp off any of the coolant hoses then. Didn’t need to drain the oil.

[@igorl8367]

@@realrandomcarstuffThank you - understood! I'll drain it then, but need to figure out how much its gonna take to refill, and procedure on how to refill (which, suspecting, would be easy)

[@realrandomcarstuff]

@@igorl8367 there are a lot of videos on changing out the coolant. It’s very easy. Just turn a knob under the radiator and it drains. Close it and then refill.

[@Buff_Dave_Oprtr]

My daughter has a 2006(ll gen) and is making the same noise. Changed plugs,cleaned MAF sensor,and,intake. Still doing it.

[@mohammedmoqbel3688]

Did you clean the fuel injector system? Does the coolant level keep dropping?

[@Martin911]

These engines really do blow head gaskets. It’s not if, it’s when. People think they have fixed it, but even with “headgasket fluid repair” it’s gonna get worse.

[@Sunnysky321]

Can you please put a link for the brush and wires you used to clean the EGR cooler?

[@realrandomcarstuff]

Set of 15 Cleaning Brushes and 10 Cleaning Needles - for Small Openings / Tubes / Pipes - for Example: Spray Paint Gun, Car / Motorcycle / Scooter Carburetor, Pet Feeding Bottle, Coffee Machine, etc. smile.amazon.com/dp/B07D8QG6M4/ref=cm_sw_r_cp_api_glt_fabc_W42E8HS0EJHWFESXZ50M

[@axmed711]

I took my egr cooler to the car wash and pressure washed while holding it under my foot it was amazing how much dark coffee like thing that came out till nothing left inside it I even could see through the other hole but didn't fix my knocking

[@RobertBeedle]

@@axmed711 hopefully you figured out the knocking. Here are some cheap and easy fixes. I assume you replaced spark plugs 1. Use scan tool to see which cylinders are misfiring. Change coils around to see if the coils are causing it 2. Change the PCV valve, only $5 but could be giving you issues 3. Clean throttle body and MAF sensor 4. If burning oil install oil catch can 5. Check to see if the EGR is stuck open (I assume you did this already) 6. Drink a beer or choice beverage

[@amazoidal]

Change the head gasket before you bend a rod. See "Gasket Masters" videos.

[@iamahood1]

Yup. Went through all the cheap fixes and still did the head gasket and issue finally resolved.

[@reddv1]

It's always the head gasket! Finally sold it last week for a couple grand, didn't want to risk opening it up and finding a bent rod and a million other things can go wrong.

[@EddieErion929]

@@reddv1 it’s not ALWAYS the head gasket. He has the problem without head gasket issues and so do I and lots of others. If you do not fix the issue that’s causing the problem NOW it WILL BE A HEAD GASKET ISSUE as a result

[@SIMPLEGUY423]

What about the head gasket

[@VeganAtmosphere]

Great video again

[@LuisRodriguez-sw4pd]

Hello amigo, I have a question! You got the same problem back after you posted this video or that fix your car issue?

[@realrandomcarstuff]

Luis Rodriguez see the K-Seal video I posted for a follow up.

[@Denniss7420]

Spend the 20 dollars and install an oil catch can. These cars have a lot of crude oil gong back through the intake manifold.

[@realrandomcarstuff]

Denniss7420 any recommendations on brand or where to mount it?

[@GodzillaMX007]

@@realrandomcarstuff look up nutz about bolts channel. He has a oil catch can installation video.

[@macspeed5464]

LOL, though this was only used on racecars. Guess i have two cars that are polar opposites that need a catch can haha

[@freddyvillalobos1180]

can you repair my car has the same fault 2011? Please live Washington state

[@ishaqsafi5786]

I have almost same problem, but mine throughing withe smoke a lot with same Knocking and help please

[@008RICH800]

Do you have high mileage?

[@golfish8589]

Can we get an update on your car? White smoke indicates coolant getting into cylinders

[@anahed332]

I hane a 2011 prius .....32000mile no miss fire .. Sparplug every 60000 Air filter every 3 oil change Fuel injucter cleaner every 30 full tank gas pce valve every 6 month Clean a ejr and intact manifult 2 time in 1year I love my car Last 2007 i drove it over 700.000 😎😎😎😎

[@derrrsopp7283]

I believer that you can unplug the electricity to the egr motor. If that doesn't fix it, its something else. Prob head gasket, or coil or plug if u lucky.

[@yehudahweisz]

PLEASE HELP!!! I have a 2012 Prius Plug-In (now called the Prime) and you MUST put car in the "Power Mode" and you will have no problem passing cars or goin up hills. My Prius won't move much if on Regular Mode or Eco Mode; but Power Mode feels like a "normal car". I also drive Lyft & Uber and in 2.5 years I put 310,000 miles on my 2012 Prius Plug-In Hybrid... which also got me use of Carpool lane with no passengers I've only done 3 oil changes... one for each 100,000 miles... no other maintenance done Now I have Cylinder Misfire and changed Coils, Plugs, and Injectors... doesn't fix issue. So mechanic says I need to rebuild engine or new engine... seems a bit much!!!

[@TechMaster2133]

100k between oil changes, Jesus Christ man at max you should go 15k even on full synthetic. oil is cheap engines arnt. Maintain your shit better lol

[@kevinheng1969]

I THINK CRANKSHAFT POSITION SENSOR

[@nb18p18]

If you haven't clean the EGR systems as shown on this video, I recommend doing so. If the problem still persist, then it could the the gasket. Prius 2011-15 has a known issue with the head gasket and usually appears 150-160K depending on driving habits and maintenance.

[@golfish8589]

@@nb18p18 what maintenance will make the head gasket last longer? Thanks...

[@terrytorres7075]

@@TechMaster2133 EXACTLY! I was reading and right away I thought, oil change once per 100,000 miles!!! And 300,000. + in 2.5 years!!! NUTS!!!! And I'm a girl and no better!!!

[@rickeagle]

Can you update this?

[@kamnorambo9837]

6 mm socket fits that stud on the side of the EGR no need for torques and it takes 20 min to remove EGR cooler max and don’t put the bottom bolt on EGR cooler

[@АлгаКыргызстан-п2ц]

Where did you ordered small twisted wires? Thanks.

[@realrandomcarstuff]

Richard Kehoe Amazon

[@АлгаКыргызстан-п2ц]

@@realrandomcarstuff thanks, how they call it?And by the way, thank you for good job with video.

[@realrandomcarstuff]

Richard Kehoe “Kare & Kind Set of Cleaning Brushes / Needles”

[@АлгаКыргызстан-п2ц]

@@realrandomcarstuff Thank you very much!I really appreciate!!

[@yethandar123]

I got P0301 code on my 2011 Prius with 250,000 Miles. And loosing Coolant and vehicle shakes when parked with the engine idling. sometime White thick smoke as well. That is Head Gasket issue. But since my mileage is already 250K, I decided to swap whole engine at Independent Car repair shop in San Francisco. Take only half day and Cost is $2100.

[@SurferTy]

Where did you go? Mine has 98k miles. I have replaced almost everything..

[@yethandar123]

​@@SurferTy P & N Auto Repair located at 77 Charter Oak Ave, San Francisco, CA 94124 Tel: [phone] Contact Person name is Lau

[@SurferTy]

@@yethandar123 thanks!

[@gasketmasters]

Thank you for the laugh. You know the problem was actually the head gasket. 🤣😂🤣😂🤣😂

[@realrandomcarstuff]

Gasket Masters Gasket Masters I’m no mechanic but yes I found out it was most likely the head gasket although what I did resolved the issue for some time. I created and left the video up since there is a lack of diagnostic videos for regular people to watch so they can figure out their issue. I’m glad I was able to entertain you as I tried to figure it out.

[@mikejohnson9398]

Please, Is the head gasket hard to repair? my 2014 is doing the same thing.. the engine shakes then after driving it for a while, the overheating signal will come on ..

[@gasketmasters]

Check out our head gasket video.

[@NinoNlkkl]

@@mikejohnson9398 it's not an easy task. Hell no. 😄 Make sure it's the blown gasket, if so, try gasket sealant. If no fix, it may be better to do a used motor swap.

[@Senorlatulla]

@@mikejohnson9398 how many miles did you have at the time it 1st started shaking?

[@sulu1men]

I had the same problem, its spark plug number 4 far to the right, make sure you tighten the plugs very good because oil seems to be getting to spark, It solved mine

[@mikejohnson9398]

Did it really solve your problem? I have similar problem and I’m losing my mind

[@sulu1men]

@@mikejohnson9398 yes,

[@sulu1men]

Since I've posted the info I havent heard any sound yet

[@sulu1men]

@@mikejohnson9398 in my opinion this issue is related to 3 faults, spark plugs, spark leads or head gasket that might be leaking anti freeze into one of the pistons

[@mikejohnson9398]

Thank you - I will give it a shot and see what happens

[@monicainiguez5077]

My code says mid fire 1 and 2

[@saborguerito]

Omg that is the SAME issue I have on a 2nd gen. With engine knock. Misfire from oil and dirty plugs but my 3rd gen also threw a code recently for this.

[@JavierHernandez-ji3ol]

Do you disconnect the battery source to do this job?

[@realrandomcarstuff]

Javier Hernandez I did not. You could but I didn’t see the need to do so.

[@humninbird40]

Can you tell its the head gasket by the misfires of the cylinders My code says 1 n 4 cylinders

[@realrandomcarstuff]

humninbird40 you will only know by removing the spark plugs and looking inside for coolant

[@asphaltentertainmentheadch5742]

What are used to put a gasket in the back of the EGR I use just regular electrical tape or any tape just to take the corner to hold it in place once you slide it in there and you put the bottom boat and it should be a piece a cake can you takeoff the tape off and then go on with the second one I put them both in and slightly screw them in and then takeoff the tape And also you don’t really need that star socket to takeoff the EGR you can just use a 6 mm if you don’t have it as long as it’s not worth🎉 And one more thing give a thumbs up to my videos appreciate it even if you don’t watch it will help

[@greatogbuagu1370]

Pls I seriously need your help. My location is Nigeria. There are no mechanics here who can really work on hybrid cars. For the past 2 months, I have been having rattling and knocking sound. With no error codes. I cleaned the whole egr systems, cleaned injectors, changed spark plugs, cleaned throttle body, cleaned PC valve, Cleaned inlet manifold, I have oil catch can installed for about 5 months now. Upon all these, the car is still rattling and making knocking sound. Especially when it's charging the HV battery. If I drive fast the sound disappears. My coolant doesn't shot, my engine oil doesn't have water in it but I noticed the oil does shot. So I can't say it's blown head gasket. And today this new incident happened. Now if I remove the 12v battery head for 5 minutes and put it back the car starts on ev only after 3 to 5 seconds then car trys to start the engine and the ready light goes off and check hybrid system light and other error lights comes on on dash board. Is this a sign that my engine knocked? Will Changing the crankshaft position sensor solve the issue? What exactly should I do? The car has 145,000 miles on it. The error codes it shows using toyota techstream now are P0335, P0A0F, C1259, C1310

[@reocam8918]

A Facebook guy reminded me when cleaning intake manifold. There are four small holes. Did you clean them all? (Feel your job is through enough

[@Nustudios]

Did you ever get this fixed? I'm having the same problem and I read from another video that someone tried replacing the timing chain tensioner. I haven't done it yet but I'll try it this week. Hopefully, it will fix the roughness.

[@WizzRacing]

First thing I thought EGR.. Common issue with high mileage cars..As it goes away real fast...You can see no coolant lose. A bad coil will not go away.. Injectors will fail but again. They don't fix themselves.. So don't guess...As it will save you a shot load of money...

[@gibson7654]

So was it egr or the head gasket?

[@WizzRacing]

@@gibson7654 Most cars it's the EGR.. But you also need to test the coil..Just switch one the suspect one. With one on the other side of engine... I would add. The way his car was shacking. It was obvious..As it went away once it got warm...

[@gibson7654]

@@WizzRacing would it be the coils if it only shakes for 10 secs after start? I'd think it would shake all the time if there was something wrong with the coils or spark plugs.

[@andreylosetskiy5217]

it’s common head gasket problem

[@sipasaelsmog8354]

Hey bro please reply I need help

[@whocares5188]

You can use a 6mm for that e8

[@WiSeNhEiMeR-1369]

Thanks COOP ...

[@VeganAtmosphere]

Great video I just have a question to all you in this same situation. I just want to replace pcv valve and clean the intake manifold and get a new gasket for the intake manifold. Willl that fix the rattling when the car starts

[@mohammedrashid1972]

Angel Calderon You need to clean the EGR, EGR cooler too

[@gaming4life718]

@@mohammedrashid1972 asalmulikum I have exactly the same problem with my car it shakes well starting the engine up can you please help me what do I need to change thank you

[@NinoNlkkl]

Its the head gasket issue.

[@Senorlatulla]

@@gaming4life718 don't drive yourself crazy, it is 98% of the time a head gasket... Check out gasket masters video on it

[@Not_Sure_]

It's a head gasket. I have a 2011 Prius. Water is getting inside the cylinder.

[@springer-qb4dv]

It's not fuel injectors. The knocking is caused by oil pooling in cylinder number 1. where is the oil coming from? It's from pcv valve going into air intake and then cylinder number 1. This is toyota design defect and only way to resolve this issue is to install oil catch can between pcv valve and air intake.

[@reocam8918]

He seems added one later

[@AbleOneThree]

So...mine did the same thing last year. Replaced egr valve, intake manifold, and even the head gasket. Only when the head gasket was replaced did the problem start. Now, a year later it’s doing it again. Any suggestions?

[@AbleOneThree]

Edit: Problem stopped after head gasket replacement.

[@SurferTy]

@@AbleOneThree Did you replace your spark plugs? That could do it.. Or the engine mounts

[@AbleOneThree]

So...the problem did come back again after all the replacements above. Different code tho. Can’t remember the numbers but it was a bad coil pack causing a misfire. Replaced it. Problem went away. However, it knocked around again the other day after sitting for a couple days in really cold weather. No code tho. Sitting at 211k miles.

[@carlene5cats]

Same thing on my 2012 prius. Dealer replaced intake manifold and all is ok. Before that replaced plugs, coils and injectors ond was still shaking.

[@Dethrones]

How much did it cost you?

[@jeremeyaubry4622]

Very helpful

[@priusprius8148]

Mit welchen Öl fahren sie 0w20 Oder 5w30 Welche marken Öl nehmen sie lg

[@terrytorres7075]

Erken, yes, thanks.

[@shadowmarlo]

Use BG products at least once a year after winter season. I use EPR before oil change. Then add MOA to your new oil.

[@elydiaz1031]

what are your acronyms? lol.... I'm about to put K Seal in 07 Prius, as i noticed loss of power uphill, some rattling, and A BIT of lost coolant. 263K

[@JSmooove]

This is exactly what I’m going through now

[@yehudahweisz]

How did you really fix it? My 2012 Prius Plug-In has same issue and after trying new plugs, coils, and injectors my mechanic said I need new engine. I have 310k miles and have only done 3 oil changes until now that I change stuff listed above. So I got an engine from Junk Yard that has 88k miles and let’s hope...

[@Kinghippi3]

Yehudah Weisz so what was the deal?

[@NinoNlkkl]

What did you pay for the used engine

[@gasketmasters]

Yehudah Weisz could have just watched our videos and changed the head gasket yourself. That 88k engine will develop the same problem at 135k

[@NinoNlkkl]

@@gasketmasters head gasket job ain't for the average.

[@Senorlatulla]

@@gasketmasters or 150K if lucky