P0300 Explained - Random/Multiple Cylinder Misfire Detected (Simple Fix)

[@callaedwards9184]

Suuuper helpful vid and helped me figure out what was wrong with my car!

[@fixdapp]

Glad to help Calla! Cheers!

[@YungYopTM]

Calla Edwards what was your issue?

[@reno5948]

@@YungYopTM Yeah, it would be nice for her to share. After all, isn’t the idea of all these posts to help one another.

[@RobertMims-nf5bc]

Wya

[@oz-fu8bk]

8 months later wya

[@kimberlysugiyama]

I had P0300 error code on my Jeep Patriot and took it to my regular repair shop. It did not seem to have any abnormality. The shop manager ran a computer diagnostic and it turned out there is nothing wrong with it. He said sometimes one random misfire on any plug for no reason will cause the computer to remember and display this code. He reset the computer and charged me $0. He told me to come back if I get P0300 again. Just wanted to share my experience here and great job explaining the potential problems.

[@Santiknws23]

Did it happen again?

[@kimberlysugiyama]

@@Santiknws23 No, it has not happened again for a year

[@Santiknws23]

@@kimberlysugiyama thank you for responding

[@Spider-Man3412]

@@kimberlysugiyamawhat about now!?!

[@kimberlysugiyama]

No problem so far. It’s been 3 years

[@David-x5j5x]

I love this video and saved me a tow and dealer repair charges. My 04 Golf all of a sudden gave P301,302,303 and 300. Could not drive the car and ran ultra rough. I swapped out the battery first and that fixed problem with no more error code and motor runs perfect as it always does. Thanks again for the video and saving me lots of money.

[@2011CrownVictoria]

Yeah there is literally no way a bad battery would cause a car to run rough. What do you think a battery does exactly? You probably had bad gas but had already burned most or all of it before changing the battery. When you disconnected the old battery you reset the ECU and all DTCs with it. See what happened here? Since you cleared the codes yourself they weren’t there anymore and since you probably burned off the shit gas the codes weren’t about to come back. Congrats, you spent $200 on an issue that would’ve sorted itself out with time and a $7 bottle of Lucas fuel treatment.

[@Mrfurballs]

Yeah a battery wouldn’t cause that issue , I bet fowled spark plugs , bad wires and or ignition coils are shot . I have a mk4 golf gti vr6 .

[@ZombieMan789]

Uh yeah but no…. There is no way a battery caused misfires in 3 different cylinders. I call complete BS.

[@jameskeeler6321]

It is sometimes never as easy as explained in this video. He does have good tips for people new to to auto repair. Check out everything he has pointed out, more than likely the problem will be discovered.

[@fixdapp]

Thank you so much for the feedback, James! :)

[@tamvo7486]

😂😂😂😂😂😂😂😂😂Ass hole machenic😂😂😂😂

[@GiotheGhreat]

“Don’t ever trust a mechanic “ words of wisdom right there! Same with lawyers, real estate agents and doctors 😆😆😆

[@zacharyhall7466]

Only trust in the Lord, for all men are liars

[@chrispy4u2]

Lol *brings car to a mechanic when he doesn’t know what to do*

[@blaketurner7989]

Doctors?

[@1Wiseman001]

My rule of thumb is to never trust anyone who knows more about something than I do and can charge me money for it.

[@dennistirado4619]

BENT COIL CONNECTOR PIN: I had an annoying and hard to trouble shoot P0300 code on my 6 cylinder 2003 GMC Envoy XL. I had replaced the spark plugs and coils and the code and misfire would not go away. Why it did not trigger a P030x error, I don't know. Just passing this along as something simple for others to check. Have a nice day!

[@gordon985]

Fixed a f150 with a P0300 and multiple misfire codes for all cylinders. 96 straight 6 low data rate misfire monitor and a stick transmission. It was the Ujoints. They were binding and slowing and speeding up the engine causing the misfire codes.

[@C.M1444]

Or you can always try putting the antenna up and tune your radio to 107.7 at midnight to receive the reset misfire signal and you should be fine

[@joylitz2477]

I’m so glad i got the FIXD scanner and youtube on my phone…saved me tons of money…this is why one day electric cars massive productions will be appreciated by all & no more combustion problems

[@fixdapp]

Thank you so much for the kind words and using FIXD, Joy! We really appreciate it :) Happy and safe driving!

[@jzahirniak]

Yeah, but you will trade them for a whole new set of problems...

[@ChristianLopez-t6x]

​@@jzahirniak people don't know there's a cause and effect lol

[@azolivas]

I kept getting the P135B code on my 17 Traverse. I had a hunch it was spark plug related. Shop couldn’t find anything wrong or misfires. Today it started throwing P0300 codes. Putting new spark plugs in now. Will update later . Thx!!!!

[@FirstLast-rr8wh]

Results?

[@ZombieMan789]

I’ve been a mechanic for 30 years and never had a battery cause a misfire…especially since the batteries only job is to crank and start the car. Once the car is running the alternator takes over charging your battery and maintaining Voltage to your computer systems… a battery causing a misfire? Sorry can’t agree with that one.

[@donnieyoung8981]

Man I've been a mechanic for 40 years and never heard of a battery causing a misfire I just had to comment on this video thanks for saying something before I did though I can't believe he pinned the comment thanks I changed my battery and it helped me fix my car no way in hell the battery calls the misfire..

[@digitalblasph3my7]

Man I’ve been a mechanic for 50 years and i never seen a battery cause a misfire

[@ZombieMan789]

@@digitalblasph3my7 Yea you see some pretty crazy stuff on KZbin sometimes but I couldn’t let this one go without saying something. People who don’t know better will believe some of this wackiness.

[@yourbore]

I've been a mechanic since I came out of my mommas snatch 60 years ago. And if I haven't heard of it it's not possible. I'm so arrogant and dumb that I only believe what I feel is possible. 😂

[@ZombieMan789]

@@yourbore

[@moparmadness74dodge]

2:10 in the video, the issue with a vacuum leak is going to be a lean condition which means insufficient fuel, too much oxygen for the mixture as another way of saying it. I would recommend a correction to the video.

[@eddielorenz1380]

You are absolutely right! The guy is this video said it wrong! A vacuum leak would cause excess oxygen as it would be sucking in more air thus throwing off the air fuel mixture and causing a lean condition!

[@brandontran5160]

Help please! So my 370z has CEL on with random misfire code P0300 with high idle of 1000 RPM at cold start. I've changed sparkplugs, welded a crack in the catalyst converter, cleaned air intake filters and CEL didn't go away. What's your advice for the next steps? Should I change coil pack, fuel filter, and camshaft position sensors? Thanks

[@moparmadness74dodge]

@@brandontran5160 If the idle will not return to 'normal' with some runtime, also with a multi cylinder misfire code, I would expect you have a vacuum leak somewhere. That would be the first thing to rule out anyway if there are no other codes. The crack in the cat also suggests maybe (not always) but that it could have experienced excessive heat which is another symptom of a vacuum leak, if the mixture is lean it will increase the exhaust gas temp. This can be hard on an engine if it is a large enough leak to keep the condition lean during heavy loads. There isn't a lot of information in this post to draw any more conclusions, but I would start it and let it idle, listen around the engine bay for sucking sounds, review the vacuum lines for integrity and make sure all are attached where needed. Sometimes during service a line can be left off and it is a simple as reattaching. Google the year of your car, model and 'vacuum diagram', it's likely you will find a diagram with the lines to check.

[@brandontran5160]

@@moparmadness74dodge So I replaced the camshaft sensors. Now my 370z is sluggish and can't go pass 2200 rpm. I checked again and it still give me code P0300 plus new code P0011 and bank 1. I reset CEL and it works sometimes and I could drive pass 2200 rpm but the CEL keeps flashing while driving. Does that mean I need to change ignition coil on bank 1? Thanks

[@moparmadness74dodge]

@@brandontran5160 p0011 indicates that the cam timing is more advanced than what the ECM has commanded. Not following the idea of an ignition coil being an issue, perhaps you have an issue with a cam phaser. I’m not that familiar with a 370z or the issues that they commonly experience. Some out there saying it could be the cam phase sensor itself.

[@jeffersonmendoza5473]

Very educational, was a great help. By the way, I loved the presentation and the production of the video, congratulations to the production team. Could you tell me what software you used for the animation? Thank you

[@jennifersmith-fu2mr]

I came here because of the p0300 code on my 01 Yukon. Turns out for me, porcelain was cracked on 2 spark plugs.

[@AquaTech225]

God I only can hope mine turns out as easy.

[@MWhiskey]

Changed ignition and spark plugs but don't seem to work, what could be done next?

[@peezy5895]

My car was shaking and throwing alot of fumes through the exhaust. when i got home it didnt want to turn on until i stepped on the gas and turned it on. not it turns on but burns through fuel quickly and i got the code p0300 can you help me figure out the problem

[@danermanerkider]

Check your spark plugs first, probably replace them either way given how cheap and easy they are. If that doesnt help, test or replace the ignition coils with a spark tester or multimeter google it, if the coils are good next check/replace your fuel filter, if that's still not fixing it, try a fuel injector cleaner, after that look for leaks in your vacuum lines and intake system, last thing it would probably be if its not any of that its time to replace the fuel injectors. Did you find out what it was, 4 months after your comment?

[@801MOTO3]

Have you found the problem a year later?

[@peezy5895]

yes it was the fuel injectors

[@peezy5895]

i replaced them

[@801MOTO3]

@@peezy5895 thanks for the reply

[@seckinbilgic]

My VAG (Skoda Kodiaq) vehicle gave the error code P0300-00. Without even testing the battery, the authorized service changed the spark plugs. Then they told me that they would remove the cylinder head and clean the valves ($1100). I didn't really believe this situation since the vehicle was working fine. Shortly after, other problems started in the vehicle 1- the horn does not work occasionally 2- the start stop gives an error 3- the cruise control did not engage. 4- It was difficult to start even though I drove for a long time. Finally, a warning came that the vehicle's battery was lower than 12V. The battery was dead. I had it changed. The warnings stopped for now.

[@tsemiu]

I just changed all my spark plugs and now my engine runs perfect again.

[@Mememo-z6v]

I change my spark plugs and cables and still shows p0300😬

[@marwts]

Mogon G may have to change the coils

[@djft6944]

@@Mememo-z6v coils

[@citizendc9]

@@Mememo-z6v Before changing them first test them. You dont always have to replace them all.

[@jameskeeler6321]

@@Mememo-z6v Could be a bad fuel injector. You should have a shop perform a fuel injection cleaning.

[@atlsdjred]

I changed every component on my jeep that would cause a misfire and I'm getting a cylinder 2 and a P0300. Not sure whats going on with it. its a 2008 Jeep Wrangler Unlimited

[@IRIEAC]

VeryVery cool explanation I love it thank you so much for this video it was very helpful and easy to understand

[@humorlesscomedy7657]

I’ve already charged all spark plugs, ignition coils, and just changed the camshaft position sensors today in the morning

[@panzerwaffen2873]

And ??

[@CHawkens]

its still broken.... =/ thats why he hasnt commented

[@humorlesscomedy7657]

@@CHawkens yep has to take my loss

[@humorlesscomedy7657]

@@CHawkens even the dealership couldn’t figure out

[@parnellmanning9852]

I'm in the same boat 2010 Yukon v8 6.2 I changed .. Fuel pump Crank shaft sensore New plugs n wires New maf sensore New throttle body 3 ignition coils... Still miss fireing...wtf ? I don't know what else to do..also had converters checked ..all is well But still misfires...what else is there?...anybody 🤨

[@jonmo2694]

Mine was a map sensor and ignition module control.My check engine started blinking when i got to 60 on the highway and i felt some drop in power and the rpms went up and i had to press the gas more, after i finally got in town it started shaking like it was going to stall, i pulled over to a parking lot and restarted it and the second time it stalled.I called a tow. Thats my experience with PO 300 .05 Pontiac grand prix, runs like new again after that $750 fix.

[@glenthrall]

Even a bad transmission filter can make your vehicle run ruff, or say a bad catalytic converter.

[@Outlawz1971]

What if it’s bad fuel do you just drive it until it’s almost empty then refill different gas?

[@panzerwaffen2873]

Absolutely right ...

[@panzerwaffen2873]

@@DevilsLuck777 agree ... Seafoam is a good creation to clean up fuel systems

[@rchokelal]

Right now, I have a Mechanic telling me that my PentaStar is looking at a $5500 CDN repair. Called out my tensioners and everything around timing of my Cams. At 275k kms, I told him to look for an engine. Not happy with my Jeep at all. 2020, tranny and rear diff because the frequency dampener came off my driveshaft while on the highway. $10 k for that, and now another $10 k. JUST EMPTY EVERY POCKET!

[@whatevil]

Decent explanation but $60/40 labour to change each spark plug? That's insane. It should take less than half an hour on the majority of cars to change ALL plugs.

[@klnvv]

Do it yourself then?

[@jzahirniak]

That caught my eye/ear too. He shouldnt list "per plug" but he is about right on the costs and even under in some cases. All three of the vehicles we have require the removal of the intake manifold to access all the plugs. Just about any modern V6 or smaller is going to be like that. It took me the better part of two hours to do them on a 2013 Town & Country...and you know book rate will be at least double that. At just $90 an hour you're looking at probably at least 3.5 hours on book rate and if you figure 6 plug you are at $52.5 per so yeah, that's probably about right.

[@wolfgangmetcalf9557]

On a 4 cylinder yes, but on a v6 it’s a pain in butt sometimes. My Chevy s10, 4.3 has a spark plug right behind the drive shaft. It took all day to get the wires and plugs out

[@michaelcarlin3602]

😅 yeah, BUT on this one you actually bbw l need to pull the engine forward in order to be able to reach back there.

[@blaketurner7989]

I got an xterra, and I had to dig to get to my spark plugs. Mechanic said it would be $600, I spent $100 and a weekend instead lol😂

[@pree9876]

Best explanation yet

[@fixdapp]

Glad it helped!

[@reno5948]

So, is it the P0300 that caused the P0014 code on my 2014 Nissan Rogue, or other way around? I’ve read so many different opinions and fixes here on KZbin that I don’t know what to believe anymore. Some videos talk about replacing camshaft, VVT sensors. Vehicle has 101,000 Kms, so I guess I can start with a new set of Iridium spark plugs, even though original ones are supposed to go to 160,000 Kms. Thanks.

[@cwanat69]

Thanks very much. You speak my language.

[@elgallo4008]

I have a p0300 I took it to the shop cause it would have a bit hard time to start but it ran still to work an back no hesitation or nothing no smoke they told me replace spark plugs so I told them that’s fine I’ll pay for them I drove off an my car started smoking up bad on my way home they said my value cover gaskets are bad so I told them they can replace them then I got it back an still misfire an smoke they said my coil packs so I told them in hope that was it an still no fix I got my car back 10x worse then when I brought it in I told them so what can we do since my car is way worse then when I brought it in spent $800 that should of been a quick job an I still have no car 2 weeks later all they said is we can’t do nothing for you unless you get a diagnosis that is another $160

[@rvtech-sn9ef]

What kind of vehicle you have?

[@LifeSavingDefense]

1st thing is to stop smoking while driving 2nd is find a real mechanic if it was worse when you left than when you walked in. Hopefully it’s fixed by now so did you find the real problem?

[@Jtv0176]

Awesome thanks you great ideas!

[@rcmodificados2658]

i got this code on 98 tacoma, after reading some comments if a battery had to do something with it, I was skeptical too, and after watching an Scotty video he mention that a bad battery can affect the computer and send all kinds of codes , in my case i cleaned the terminal connectors , and after 300 miles no codes so far

[@heroknaderi]

Thank you

[@Pedro-ff4oc]

I got this code on a new car at 161 miles. Dealership mechanic said it's because of car's computer or bad fuel (car was sitting on lot for long time).

[@fixdapp]

Sorry to hear that - have you gotten the problem resolved?

[@TheVANITYKILLJOY]

I ignored my check engine light. And then my truck started to make a pop noise and i lost a lot of power and went way slower also each time it made the pop noise my truck jerked. Anyways it’s a 1200-2000 dollar repair cause they have to take it to a machine shop and flatten it out or whatever. 🤷‍♂️

[@davidporcell1480]

My 98 Chevy is same way ,code po300 ,pops from mufflers shakes no power idk whats wrong with it, new spark plugs wires still good cap still good

[@guillermosaquicaray3899]

Por favor, xq no hacen videos en español así nos ayudaría a los que no dominamos el inglés..gracias

[@TroyHarrison-c4g]

Great video

[@titorojas333]

I completely agree but what about when it comes to diesel engines?!

[@PatmanAstro]

Man my 05 Nissan Xterra got this man. I fixed all of this and it’s still showing

[@lejend69]

i have multiple miss fires i have changed spark plugs and coils but have a evap leak would thta cause it

[@samsen3965]

Very good explanation of the problem.

[@winsmith9804]

Let keep throwing parts at it, until you run out of parts. If you are going to throw parts at it like the video suggest. Take it to a mechanic IT WILL BE CHEAPER.

[@samsen3965]

Will I pass the state (California) Smog test with this code? if there is nothing else wrong and no Check engine light?

[@fredkunz8617]

See at least one problem, the battery main use is to start the vehicle once vehicle is running the alternator does the power to electrical system not the battery hence cranking amps the ability to crank over the engine

[@nato9157]

Damn never knew a battery could do this

[@YungYopTM]

Renato Shealey im charging mine right now 😂 wish me luck

[@sexystate6562]

What about if the compression comes on the dashboard what does that supposed to mean

[@reno5948]

@@YungYopTM Well, was it the battery? I’m working on resolving problem on my 2014 Nissan Rogue, P0300 and P0014.

[@YungYopTM]

Reno nope my underlying issue was my coil packs. I found out that bad cam shaft sensors won’t allow your car to go over 2000 rpm

[@reno5948]

@@YungYopTM Thanks

[@AxisAnimations]

Hey, i have a grand Cherokee laredo 2009 3.7L , there was a problem with coil number 5, i'v replaced it also replaced spark plugs, but some times when i'm driving the car suddenly i feel a high vibration it looks like from the engine but when i stop the car and start it again after 1 minute i don't feel any vibration, with a scanner there is misfire with cylinder 3, any thoughts about the problem please!!

[@fixdapp]

Misfires can be caused by several different things. It sounds like you're on the right path with replacing the coilpack and plugs. Always be sure to replace the spark plugs with a good quality plug. Example is an O.E recommended replacement, and be sure to replace all spark plugs at the same time. P0300 is a fault for random multiple misfire, P0303 is misfire cylinder 3. If cylinder 3 now has a misfire you can quickly find out if this is a coilpack issue by swapping the coil pack from the cylinder with the misfire code to a cylinder that does not have the fault. Example for cylinder 3 misfire. Engine off Locate cylinder 3 coil pack. Standing in front of the engine , driver side (bank 2) there will be three coilpacks. Counting from the front of the car to the back these cylinders are 1,3,5. Remove the coil pack from cylinder 3 and swap that one with cylinder 1 or 5 (all coil packs are the same so whichever one is easiest to get to). Reinstall and start up engine. If the misfire fault moved from cylinder 3 to the cylinder you installed the coil pack, you know that you are looking at faulty coil pack.Now there are a few other things that can cause a misfire. Look for any vacuum leaks. There are many plastic / rubber hoses under the hood and over time these can become brittle and crack or break. When this happens unmetered air can be entering the system causing the vehicle to run lean and causing a rough running issue or misfire. A vacuum leak can be hard to find and may require a smoke test to be performed in order to find the leak. There are a few different ways to quickly check for a vacuum leak. First do a visual inspection looking for any cracked lines, hoses etc. Then gently move the hoses, lines etc around and listen for any hissing noises or changes in idle when doing so. Another way is to spray a small amount of brake cleaner or carb cleaner on connection areas. This will increase the idle also letting you know there is a leak. BE SURE TO NOT SPRAY CARB CLEANER OR BRAKE CLEANER ON HOT SURFACES OR IGNITION ITEMS AS IT IS FLAMABLE! A few other things that can cause random multiples engine misfire are faulty fuel injector, dirty fuel injectors, dirty or clogged fuel filter, vacuum leaks, mass air flow sensor along with other sensors in the system. Once all other items are ruled out next step would be to check engine health by doing a compression / leak down test. This may be something you will need to have your local auto shop do as special tools are required. Hope this helps!

[@OGRuth]

My truck has been at the ford dealership service Dept for almost two weeks for this issue . They refuse to do it this way and no one knows what’s wrong . I am without a 2018 raptor and have been renting a car and it’s costing a fortune . What should I do ? They won’t listen to me and watch these videos .

[@jameskeeler6321]

Take it out of the dealership and find a competent mechanic.

[@notabot3518]

Fuel injector for my car is 30$ where are you getting these prices

[@moparman1117]

lucky you haha for me if i want to get oem spec or better i am looking at 400 for oem and for some grams fuel injectors im looking at 700 smh.

[@notabot3518]

@@moparman1117 what kind if car? Me, volvo 850 1997

[@moparman1117]

@@notabot3518 98 Honda prelude

[@fixdapp]

Hey not a bot, we have a few different places we check after asking our mechanic. A good place to look is at repairpal.com (if you're ever wondering), Cheers!

[@nonamenolast4648]

he also said 40 bucks per sparkplug in labor.

[@Zorlof]

You forgot to mention the throttle body and sensor.

[@albertocunha5648]

Very good!!

[@fixdapp]

Thank you, Alberto!

[@robrohrke8694]

So what if your p0300 is accompanied by p0420 and 0430?

[@xkingxe1718]

Did you ever get an answer to that ? Have the same codes

[@earlcruickshank9214]

DId u get answer?

[@2011CrownVictoria]

Faulty catalytic converter(s) that are also causing misfires due to back pressure, overheating, faulty o2 readings downstream etc… Basically, bad cats. Grab some cataclean from the store and see if that fixes it.

[@paulristow9066]

My problem ended up being the oxygen sensors had three of them ended up changing all three solved the misfire.

[@MD11303]

I got this code on my mustang 5.0. Everytime the check engine light blinks the car stalls n u can hear it n when I try to hit the gas it goes nowhere.

[@everettdevore1072]

So 02 Cadillac Deville 4.6 Northstar v8 has a misfire runs fine cold once it heats up boom misfire , I've changed maf ,map, tps, plugs , i take gasket intake boot , no vacuum leaks ,put another fuel pressure regulator on also , any ideas?

[@jameskeeler6321]

Could be a burned valve. A compression test would be in order.

[@aidenwilson6805]

Yep same damn boat replaced EVERYTHING SMH

[@NoLiesToldTV]

Well i have the P0300 and the P0122 code which is for the tps sensor which i replaced because it came with the new throttle body i just put on along with spark plugs wires coils 02 sensors map sensor iac valve air filter fuel filter and fuel pump. I have an 02 buick century with over 250,000 miles it idles low and high

[@seventhdaymusic]

Can extreme cold (-8 F) cause an engine to misfire when first started?

[@20tea]

Maybe a leaking intake manifold...

[@i_ankitsharma]

I have recently bought a 2024 make Street Triple R in India. After just riding the bike for 40 odd kms my bike started behaving differently and started knocking. Soon an engine check warning started popping up for few seconds aş I accelerated it. I took the bike to the service center yesterday and ön diagnosis they found one of the spark plugs (No.1) burnt. They replaced the faulty spark plug and the error vanished. The next day while I was leaving for my morning ride I encountered the same engine check warning popping up on my meter and the bike’s behaviour saw a sudden similar change. It started to feel underpowered and sound also changed. They have also replaced the injector and fuel pump. But, the problem still remains. what should I do in this case? This is brand new bike which has not been even ridden 50kms. I cannot afford to get a new bike ripped apart again!

[@IAMTheeMiss717]

Would a mass air flow sensor, or even a bad MAP sensor have anything to do with misfires?

[@aidenwilson6805]

I'm in the same boat , replaced map,maf,tps, filter, everything still there

[@IrnMaiden304]

Only problem is most cars now a days the voltage regulator is computer controlled like with Honda and the ELD in the underhood fuse box, it reports to the ECU to tell it what to do as for charging the field of the Alternator to put less load on the engine. Turning on thing's like headlights and blower motors should make the ELD tell the ECU to crank up voltage from the Alternator and if it doesn't you could get the wrong reading

[@saintanthony1529]

Can anyone tell me if misfiring cylinders can cause an engine to seize? I have a 4 cylinder honda; the engine seized a couple of days after I had the scan done.

[@saintanthony1529]

@Andrew Dean Thank you. I thought the guy who sold me the car was just unloading a problem on to me; turns out I got a hole in the oil pan somehow....

[@jamiemadrox2133]

Love this video it explains everything u my new teacher

[@MARIUSMIGUEL]

Perfect video tenks

[@eclecticgbg4892]

Probably needed that how to make friends video more 😂😂😂😂🤦🏻‍♀️🤦🏻‍♀️🤦🏻‍♀️ Thanks for all the info SUPA helpful New subscriber here 👍🏻👍🏻👍🏻

[@Fernandro]

It’s hard to make friends now in these days 😷

[@chrismasterson950]

Bro them prices are insane. You getting your work done in a Bentley in Beverly Hills? Lol. It literally took me 15mins to change all 4 of my injectors. $40-60 each if u get from auto dealer. Maybe 150 if you have a serious sport car.

[@g10prodriver76]

Doesn’t the alternator take over after the battery starts the car?

[@dereklaverne7608]

It takes over most of the load but Not completely, like your radio will shut off, guages, and other electronics , so yes the alternator can run a car without a battery but it doesnt run everything. You wont go far.

[@scootersonlyrepair6773]

If the battery is bad it will suck more power than the alternator makes and kill it. Especially if you have lights and radio on

[@bilabidennis3846]

How can I get FIXD for detector For transmission

[@iamninfamolina]

You are too funny! Thanks! You helped me a lot!

[@fixdapp]

Glad to hear it! Thanks for watching!

[@mrmoveup7953]

Can a accidental downshift cause this light to trigger? My CE light turned on an turned back off hours later the same day, I downshifted to 1st going 20 mph..smh

[@mrmoveup7953]

I had got a error code P0300

[@yoz1967]

P0300, rough idle, no check engine light on. 2003 Tahoe Z71

[@jeffersonmartinez883]

Nice my friend blessings

[@jvazquez7160]

What about clogged catalytic manifold

[@ajm82]

Did not know about the battery causing misfires

[@fixdapp]

It's not always common knowledge!

[@arnelcastro9447]

Nice video ! Right now I have a problem w/ my 2009 Nissan Sentra with cvt transmission. It has 225k km in it, the problem is when I drive for around 1 km only my speed is only 40 to 50 km only w/ 3500 to 4500 rpm. And you can hear the engine like a mad man. I already replace the speed sensor but still no good result. I appreciate if u can give me some advice thanks n more power!

[@fixdapp]

We'd probably need a little more info, but I do have one suggestion (it's sneaky). If you have an Obdii reader you can try the premium version of our app for free. Then you can call a certified mechanic who will help troubleshoot some problems for you! Cheers!

[@j249007]

You need a transmission line cooler. There was a recall on these cars

[@Suckmyjagon]

Transmission control module

[@myonlyaccount]

intake compression power and exhaust!

[@magnussoevgaard8091]

Great explanation.

[@FalloutUrMum]

I can not find how to check my battery in the app

[@kyore789]

You guys are like donut. I dig it.

[@user-ti2vw3oo5o]

They're trying to be 👀

[@jerellhall8520]

I have a misfire on 1 and 2

[@gamingwitchutuu429]

Maaan I don’t know what it is and deff don’t got the monies to fix every issue

[@bigal9558]

P0300 code, blinking check engine light, violent shaking. Change out all 16 spark plugs and coils, still shakes and smells rich. Could it just be flooded with gas? It’s a 2011 Chrysler 300 C V8 Hemi with only 75,000 miles. In fantastic condition. I have a feeling it’s just flooded but unsure if the original misfire could cause it. Any help is appreciated!

[@abramporras7877]

Change out your crankshaft sensor

[@2XPWeeknd]

What was the problem?? same thing with my integra

[@nazareta6541]

Did you ever figure it out? I have a P0300 code only, with CEL and shaking misfires as well. Plugs and wires changed 50k miles ago. Cleaned MAF. Clean air filter.

[@nazareta6541]

@@2XPWeeknd Did you figure out your problem? I have P0300 code only, with check engine light and heavy shaking misfires

[@nicsarahgreene2635]

Did you ever figure out whats wrong with youre car?

[@sammorgan31]

A vacuum leak causes too much oxygen.

[@kylevanzee1672]

Alternator??

[@quadare1]

Bruhh I took my Lincoln mkz to a repair shop they did everything they could and suggested that I should go to the dealership because I probably need an update or something

[@raymonddotson4505]

Bad gas / water in tank

[@TheKsteder]

Did anyone else notice the injector? Clearly a 6.0 powerstroke diesel HEUI fuel injector

[@josselynyamiillescas1280]

Me gustaría oírlo en español gracias

[@michaelgaeta3151]

O2 sensors?

[@jamesweidenfeller2699]

Battery? Don't you have an alternator

[@andrewgutierrez3009]

2002 Lexus gs300 misfire on cylinder 1, 2, and 3

[@abramporras7877]

Ain't the fixed sensor just going to say "multiple misfires p0300" basically what we already know

[@scootersonlyrepair6773]

You never mention the distributor. Replacing my rotor and tightening my loose cap got rid of the code po300

[@nazareta6541]

Loose gas cap? Or..?

[@THEsatanicDucky]

@@nazareta6541 he's referring to the distributor cap, it's usually on older vehicles

[@hakhandare]

Can it be o2 sensor fault??

[@1326jport]

I have a 2000 JEEP Grand Cherokee with the 4.0L Straight 6 and when starting it up sometimes it will have a really nasty misfire and if I just rev it up or just start driving you can hear when the other cylinders actually start firing. I have codes P0138,P0300 has anyone else had the same issue as well??? I've changed plugs and didn't really help then I bought the coil pack and yes its the weird one where you get all 6 on a long bar. When I replaced that my JEEP would not run at all. So I put the old one back on and it ran fine other than the misfire once in a while. Its not every time I start it just when it wants to be stubborn. Any ideas anybody??

[@jameskeeler6321]

Check the compression first. Then look t the fuel injectors. Could also be bad ignition timing due to a worn timing chain.

[@xThat1dude]

The valves in the carton engine doing intake and exhaust valves opened the wrong way

[@randalceniceros8157]

Mine was valve cover gasket leak Oil in silo

[@BreakingNVain]

I've been having this problem with my 2010 Dodge Charger, 3.5 L V6 for a year now. Even with new spark plugs and ignition coil. NGK plugs and coils. New driver side catalytic converter and oxygen sensors. New transmission filter.

[@antoniowolfe2041]

So what fixed it ?

[@BreakingNVain]

@@antoniowolfe2041 Nothing. Pretty sure I have a burnt-out valve in the engine.

[@roncon1180]

Is p0300 the only code you’re getting? Or do you have codes for specific cylinder misfires too?

[@Oldieeeee]

Mine sounds like a dying lawn mower... Happened out of nowhere sigh

[@edbass2769]

Almost everything was reasonable except the piece about the battery being strong enough to start the engine but too weak to run the spark plugs. That's nonsense.

[@richd5749]

Ok, is Scotty Kilmer mecanico at large your Dad 🙃🤣🙊

[@csl9495]

Damn... im really hoping it aint my fuel injectors