EricTheCarGuy Explains Check Engine Codes - P0300 Random Misfire Detected

[@TRQ]

√ Watch the Video √ Buy The Part at 1A Auto 1aau.to/m/Shop-TRQ-Parts √ Do it Yourself √ Save Money

[@RollForeverr]

Perfect! So it could be anything….

[@johnc2wa829]

Eric the Car Guy!!!! You’re the best bro. Good to see you online again!!!!

[@lisandromelendez9545]

Eric the car guy. Welcome back brother. Love your teaching.

[@dognatious6153]

Thank you for opening up Pandora's box. Now I'm totally overwhelmed. There's got to be a mechanic that can zero right in on it.

[@GordonPettieFishing]

This is the best all inclusive video I have seen on misfires. We'll articulated and easy to understand. I'm dealing with a reoccurring misfire on an older 5 cylinder Hummer. Wish I had seen this video 2 months ago. It's taken me 2 months to learn and be acquainted with pretty every possibility you demonstrated here. 👍

[@Brian-vh7gb]

So great to have you back making videos! You're already making a difference. Just yesterday I was test driving a 2008 Lincoln town car with 4.6L V8 and the car was shaking and had low power. It got progressively worse during the 15 min test drive. Check engine light came on solid at first and then started flashing after about 5 minutes. We had to drive another 7-6 more minutes to get it back to owner's place. Owner ran a scanner and came up a bunch of codes: P0305 misfire cylinder 5; B1990 Pedal Forward / Rearward Potentiometer circuit fault; B1676 Battery voltage out of range; B1318 Low battery voltage at module. So first thought it was only a cylinder 5 misfire problem and maybe just addressing this would fix it the flashing check engine light. But luckily I came upon your video that point out there could be other potential causes. Could a single cylinder misfire cause a flashing check engine light or would it take more than that? Could just the cylinder 5 misfire also lead to all the low voltage codes that were also detected? You mentioned how low system voltage affecting multiple components can lead to misfires and in this car all these low voltage codes came up. With a flashing check engine light, how much engine or cat damage could occur if you drive the car like this for 7-10 minutes? Could just a few minutes driving with a flashing check engine light cause damage? Thanks again for all you do!

[@rishirammoonesar3171]

He's absolutely right. When the alternator or the battery goes bad while driving is at its edge of failing the car will either stall or sputter even If the connections for the terminals on the battery is loose

[@seanbryson4528]

Eric, thank you for sharing your knowledge and experience. When it comes to mechanics on KZbin, you’re second to none!

[@MrLee20099]

Yep the dreeded P0300 code. Even mechanics start throwing parts at the car. Been to a couple already 😢

[@4168kid]

Its usually bad coil packs. BOOM! Saved you 5 minutes. Trq, i especially love how everything works outnin your videos or how you only do the easy thigs, like the front but not rear spark plugs in an older buick century. Or how everythinf magically just ligns up in replacing motor mounts on a vehicle.

[@sdcalilivin]

Clear, succinct, and thorough to boot!Damn this guy definitely knows his stuff! Thank you ! Instant new subscriber!

[@TRQ]

+@sdcalilivin Thank you! We love empowering our customers and showing how to perform DIY auto repairs with our high-quality auto parts. 1aau.to/m/Shop-TRQ

[@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!

[@elkuartostudio]

So, everything can cause a misfire😢

[@beverlybond9481]

Well I am TODAY YEARS OLD. I thought a misfire was whe the care does not start or dies or has a hard time starting!! Thank you ERIC for all this very important info.

[@MT-rc3gn]

Im seeing Eric on his way to becoming the new Pat Goss 😁 a national treasure, for sure

[@plankton199]

Could also be the coil driver circuit on the PCM. That is what caused mine...

[@tombanes]

Great great video. My battery is starting to get weak and I don’t drive it very often so it makes matters worse. I suspected the battery as a cause for the misfire and crazy engine shaking since it occurred right after a cold start up twice in the past 40 days and only 200 miles of driving. The resting voltage of the battery is about 11.8 v. In the past I replaced the batteries before I had any issues . Will do more testing to confirm.

[@TRQ]

+@tombanes Thanks for watching our video! 1aau.to/m/Shop-TRQ

[@emilywelsh1072]

Thanks, this was very helpful!

[@neelrivera2010]

I bought a new EGR from TRQ and I hopr this solves the issue

[@JosegabrielDuartearroyo-xp2kk]

Me sirvio mucho tu informacion amigo gracias

[@KyleMullins-g7v]

Great job strait to the point without a lot of bs

[@leeroach3381]

Very helpful Thank you for sharing

[@kevinramirez6772]

The most helpful video I ever seen

[@CarlWilliams-u3y]

An Actron CP9690 checks misfires. Erase the codes and check misfires. Warm the engine to check for a leaking head gasket.

[@adrianperez-nq7be]

Gracias por este gran video e informacion. .

[@davidsamora]

What about fuel pressure? What about a bad transmission? I have a 2011 Toyota Tundra that runs great until I put it in drive or reverse. Starts misfiring and shaking all over the place. Help.

[@ahmedbamouh4936]

Thanks for the tip 👍👍👍👍👍

[@j.jarvis7460]

This is video and it's content is both amazing and downight awesome!

[@chayomartinez8050]

Buen videos gracias por compartir su conosimiento

[@guruhood4795]

Awesome and much appreciated video

[@adilkhan-j4m]

Good information 👍

[@peperodriguez9638]

Thanks a lot for your information bro, very helpful

[@gearhead3500]

2003 Toyota Tacoma 2.4 is having a misfire on cylinder 1 p0310 I checked spark swapped coils what else should I check

[@mpasaa]

Great info. Quick question....can a cracked engine block or something major like this also cause this misfiring? The reason I ask is that I just had to get a Jeep Patriot engine replaced after 160K miles as the shop (reputable and I think honest) tested all of those other things and the Jeep engine simply wouldn't run. Since getting the engine replaced I've had no issues and I don't believe they replaced any of the existing electronics or vacuum lines, etc.. They did replace spark plugs in this used engine just to start clean although the coil packs were probably from original engine. One thing I did just replace the other day was my battery which suddenly died although it was almost 5 years old and the past couple days were the first cold ones since last winter. In your video you did mention voltage could also impact these electronics and their operation but I think the previous battery was tested a few months ago and was still holding a charge and I was using it until the other day with this replaced engine so it had to be working fine with the replaced engine. That P0300 code is annoying...as an I.T. person I equate this to the Windows operating system general protection fault from the old window's days which meant.....good luck finding the cause :-)

[@JackleenaO]

I have an 05 Jeep Liberty throwing a P0300 code. Check engine light has disappeared but when i check for codes (cycle on off ignition key) the p0300 still shows... and accelleration is def sluggish. One video i watched here on youtube suggests that the ASD relay is often overlooked cause for this code. Penny for your thoughts? ASD relay? O.o

[@riceburner4747]

Hello Eric. Great video! U are always interesting👍

[@Ro-bp4rs]

Muy bien explicado

[@hootinouts]

Thank you Eric. I took my 2006 Saturn Vue off the road four years ago and am finally getting around putting it back into service (long story). The last thing I need to do is buy and new battery for it but before I did I connected th Saturn to the battery in my Nissan (which I disconnected for the car). The Saturn started up and it ran, but then I noticed the CEL lit (not flashing) and the engine was running a bit rough. Plugged in my OBD CAN scanner and retrieved a P0300. I'm going to start with the simplest, least expensive and take it from there. I'm wondering if the four year old gasoline is a possible culprit or maybe the injectors are junked up from sitting for four years. Also, maybe the long jumper cables I used to run my Saturn through imposed a significant voltage drop. Guess I'll find out once I roll up my sleeves and start diagnosing.

[@LT-wt8jn]

My check engine light blinks on start-up, runs rough for maybe a min., but then smooths out, and runs fine. But the check engine light stays on. I had it scanned, and the P0300 code is the code. I have a 2011 Mercedes E350 Sedan.

[@TRQ]

+L T We wouldn't be able to diagnose an issue like that here, you may want to have a local mechanic take a look at it. Thanks for checking us out! 1aau.to/m/Shop-1AAuto-c

[@sunfiregirl9927yaho]

Thank you so much sir

[@jamesdumas6602]

We had a medical emergency and had to drive about 500 miles with a Flashing Check Engine Light caused by a failed Igition Coil on a 2019 Ford E450 RV with the 6.8 V10 with 20K miles on it. A Ford dealer replaced the igition coil under warranty, said everything else is OK. RV runs fine. What happened to all the unburnt fuel that went into that cylinder? Did blow out though the exhaust, blow by the rings? The oil had less that 1000 miles it at the time, still looks good on the dip stick. Thinking on changing it anyway before the next trip. No other error codes now. Any thoughs appreciated.

[@wolleyreikivalley]

this is happening to my 2006 TL automatic, only at WOT through a couple gears, doesn’t seem to run rough, just flashes these pending codes or occasionally a current code. it has all new plugs and coils and i’ve checked the egr system and the only thing i’ve found it a bit of oil in the spark plug wells

[@TRQ]

+Wolley Reiki Valley Thanks for watching our video! 1aau.to/m/Shop-TRQ

[@manirandhawa2918]

Its good i have buick verano 15 same sound of misfire by cylinder 3 so whats the problem? Is plug problem or fuel injector can u tell me

[@fastracer1291]

I change the engine. Now don't misfires anymore 😊

[@gera4ali]

Eric, I have a 2007 Aveo, keeps showing , p0300,p0301p0304. I have replaced spark plugs, wires and coil. Also replaced throttle body, pvc valve, map sensor, fuel injectors, and even timing belt. Engine show no sign of misfires and runs good, but when driving above 55 mph check engine light starts flashing and shows random engine misfire, cylinder 1&4 misfires. I did a compression test all cylinders are at 180. I checked fuel pressure and it’s a steady 55. I have run out of ideas, do you have any advice?

[@shanebaker3404]

2011 Chevy Cruze Turbo (Keep in mind neighbor has messed with golf cart twice and removed the cables because he tried bullying me and I didn't let him) out of nowhere my car started overheating and the cable either was cut or melted. How all the sudden does all the fluid poor out? I took it to the auto repair shop and they replaced the hose for the antifreeze and said it was way too low and leaking out of the hose. They said the transmission was bad and it will hesitate forward and reverse for two seconds before going into gear.

[@kevinc9416]

Hey Eric, I have a 2000 Acura RL and I had the codes and replaced coils with TRQ, still have the same codes showing, P0300, P13001-1306. Had TRQ send me another set of coils and still having the codes, what do you suggest?

[@seanm2216]

Gotta love the clean shirt, clean hands, clean hat, but dirty jeans.

[@WilliamMunny-d8s]

What about on a 76 F150 390 FE with original autolite or remand carb? I HAVE A LOW COMPRESSION #4 ABOUT 20 LESS THAN NEXT LOWEST 1. first check for compression on all cylinders to assure no holes in pistons, headgaskets, valves etc 2. check plugs wires coil etc ALL GOOD/REPLACED 3. check intake area for vac leaks with carb cleaner PLUGGED ALL NON ESSENTIAL VAC PORTS except brake, pcv, Dist, tranny BUT I STILL have a misfire also has an off idle stumble and very fine rust/dust in pre pump fuel filter so ive ordered new tank, sender and carb to hopefully fix stumble. Would a leakdown test narrow it down or can you already say what the problem is?

[@Qghostz]

Hi Eric Please help 🙏 my Nissan 370z Nismo show P0300. I placed ignition coils, spark plugs, both pcv valves with oem parts. Clear the code but after driving around 80 miles the P0300 come back. Do you have any recommendation??

[@w.d.gaster8872]

🤯 so how do you cut this down and figure what exactly can be the misfiring from? Repair everything?

[@lar4305]

Any ideas for p0300 code , it misfires only when pulling a hill , on and off while going up a long hill. 04 jeep liberty 3.7. runs fine in level.

[@williamrosario6369]

What about oil in antifreeze reservoir tank does that mean a blown head gasket on a 2000 honda civic lx

[@MiSTOR-RESISTOR]

My agm start stop battrey is charging between 14.3x-15.7v could this cause a misfire?

[@andycostilla]

Hello Brother. I have a 2011. Corolla. My air filter is torn with holes and I have p300, p302 p303 p304 with start but no turn over

[@borburata1]

Hey I have multiple codes on my 2011 Honda pilot, p0300, 301, 302, 430 and multiple lights on, What is that?

[@isidrosaucedo1218]

Y como Saber de donde empieza el conteo 1,2 ,3,4 de frente o del lado trasero

[@robinhockett1191]

Yes I have a 300 misfire Stay with me. My car is H H R need to see

[@larryh1956]

After a rat chewed on my coil wire which was shorting on a metal tube ( ground ) when I go to live data it only gives info on 4 cylinders. It is a 6 cylinder. In the past my scanner gave info on all 6 cylinders. A standard coil puts out 20k - 30k positive voltage. With that much voltage going to ground I think it has caused a problem inside the ECM. What do you think? I don't see any other damage to my wiring.

[@Yasser-w5s]

Thank you

[@64arguz]

‘10 Tacoma 2.7 , P0300, P0301, P0302, New : spark plugs, coils , crankshafts sensor, fuel pump and computer, vacuum checked, before those Codes it passed the emissions test but valves were rattling on acceleration and then the codes appeared 🤦‍♂️ Any idea or advice will be appreciated 😔

[@RAY_FILET]

I have a 2023 GR86 with less than 5,000 miles, with an engine that's never been red lined... I have no warning light, but, there is a small amount of white smoke coming from the tailpipes at startup, and I believe that I am registering an average of one misfire per trip,. I think that maybe happening only at idle in public driving but not sure.. The car seems fine after I'm on the road, and other than the smoke, I don't notice much wrong. Any suggestions?

[@Jimmyky77]

How about a faulty fuel pressure regulator?

[@Ghostygoon]

I had a flashing cel but it went off after should I be worried?

[@jeffhollers]

Would the flashing be the coil packs or fuel injectors

[@Qghostz]

My 2011 Nissan 370z Nismo still show P0300 even though I’ve already spent $2,000. I replaced all parts with OEM like Spark plugs, Ignition coils, PCV valves, crankshaft sensors, air filters, oil changed, and evaporation purge valve. What’s else should I replace to make engine light go away?? PLEASE HELP 🙏

[@edwardcruz4039]

Is TRQ a good parts brand

[@naimoura]

Thanks

[@jimjab3631]

Misfire is simpky somtjing an auto engineer designs to fail after warrenty. Also requires dealler to fix as rhey have the proprietary tools.

[@osbaldoa.castro488]

Thank you.👍🏽

[@turbyturbo1]

Good stuff

[@narajuna]

Well I drive my ford 2003 escape V6 with flashing light... #4&6 have misses at start or when hot :( Afraid oil seal bad on those and gets that first oxygen sensor dirty :( BUT the chain will cause all cylinders to miss.... Mechanic cut off my clogged Catalytic.

[@orlandosaldarriaga5049]

I have a misfire cylinder 2 and 4 codes are p0304 and po302 any suggestions

[@santosmoreno9656]

A.m3chanic told me that he has to replace the Cylinder head to fix that code.What should I do

[@Ryder415x4]

One time I was in the freeway with traffic and I changed to the left lane bit there was a car coming quick so as soon as I changed it I accelerated very fast and as soon as I did the car literaly started to choke and the whole engine was vibrating very weirdly like shaking and choking and the flashing light came on but I couldent stop and I went to an O'Reilly 1 hour later after driving and I got p0174 and p0300 but after that I never got the shaking engine again but I do get the p0300 and p0174 especialy at cold starts the engine idles very rough and very weird but. When I drive it it's fine and it's a 03 gmc yukon xl 6.0 by the way and it's driving me crazy that very rough idle to the point it wants to choke and shut off so I gotta warm it up and drive away

[@xandao]

Perfect!

[@Jacosta27]

I got a misfire code but it’s running smooth

[@JedimillerReturns]

i have misfire in engine 1 and 2. so basically it could be like 30 different things????

[@MilitaryMatters1]

Im not gonna lie.. if it RANDOMLY happens-- it's probably related to the valve springs or valve seats.

[@TimR1216]

What about O2 sensors??

[@rhdadrian]

What would a flashing loght indicate? Sometimes it flashed going up hill then looses power? How do i diagnose the egr and clean or clear the runners for a 13 scion xb thank you!

[@TRQ]

+@rhdadrian We wouldn't be able to diagnose an issue like that here, you may want to have a local mechanic take a look at it. Thanks for checking us out! 1aau.to/m/Shop-1AAuto-c

[@PappaRaamiz]

Chevy cruze 1.8 and model 2011

[@dennistirado4619]

Hi Eric. Thanks for your videos. I have a problem I am hoping you can shed some light on. I had engine misfire and replaced all. the coils and spark plugs. The misfire went away. Also have a new fuel filter. Six months later, I am experiencing a random misfire. Sometimes the car runs perfectly, and all of the sudden it misfires for a few seconds and the "Service engine light soon" flashes on and off during the misfire. No check engine light. Then it goes back to running ok. I have poured motor treatment liquids to see if cleaned injectors and the such. Once it misfires, I can detect a P0300 code and troubleshooting this has been difficult. I do not get more specific codes. 2003 GMC Envoy XL 4.2L 6 Cyl. Any thoughts?

[@TRQ]

+@dennistirado4619 We wouldn't be able to diagnose an issue like that here, you may want to have a local mechanic take a look at it. Thanks for checking us out! 1aau.to/m/Shop-1AAuto-c

[@paulaflynn9170]

So I have P0306, p0304 and P0300 but the car runs great. What now?😢

[@bdeme3759]

Ur beard will never misfire!

[@jeffj9055]

If you have two cylinder showing low psi what could that be?

[@ramonvelazco4884]

Diablos amigo eres un genio

[@Borkenheeimer]

I had a P0300 code on my 2000 tacoma prerunner, and it would shake and misfire on cold start and then even out as it ran longer. The weird part is that the code went away after I added some injector cleaner. My truck now cranks over a little more then usual on cold start but is running almost the same w a slight loss of power. Anyone have any ideas why or what I can do to help my engine?

[@PappaRaamiz]

Can i have one question about P0366 code 🤔

[@PappaRaamiz]

Hello sir

[@ወዲክፍላይ]

I got the same code

[@kisoshi898]

Can cheap gas cause a misfire code?

[@mariscalf2412]

When ever I turn the AC. I get the code. Is that normal?

[@omariengram5693]

I dealing with a misfire now. Do you have a video on Cadillac CT6 3.0 V6 twin turbo changing the spark plugs?

[@perlaalmaraz9574]

Cuánto vale

[@myfavorites1016]

I got that code my car check engine light was steady . It's more likely sparkplug issues original plugs , carbon on valves

[@fullpeladas]

Basically new car is a big dump too many sensor like domino effects 😢

[@EppingForest304]

👍🙏

[@TRQ]

+@EppingForest304 Thanks for watching our video! 1aau.to/m/Shop-TRQ

[@milokillz4309]

Also if there is 50% chance of rain also if the sky is blue also if you slam the door hard also if you ware the color red also if you drive with one hand also if you have hazel eyes also if you have on son also if the car is stick shift also if you’re gay may cause a misfire!!!!!!!!