EricTheCarGuy Explains Check Engine Codes - P0300 Random Misfire Detected

Find your TRQ parts here: 1aau.to/m/ETCG0300
Eric the Car Guy is here! He's visiting TRQ to explain check engine codes to you! In this video, Eric the Car Guy checks out code P0300, which means your car or truck is experiencing random engine misfires. The full description of the code is “Random/Multiple Cylinder Misfire Detected.” Codes P0301 through P0312 also indicate misfires, but all within a specific cylinder. You may feel your vehicle shaking under some misfire conditions, or acceleration might feel sluggish. Check out the video to learn more!
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[@TRQ]

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[@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.

[@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!

[@emilywelsh1072]

Thanks, this was very helpful!

[@peperodriguez9638]

Thanks a lot for your information bro, very helpful

[@leeroach3381]

Very helpful Thank you for sharing

[@j.jarvis7460]

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

[@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. 👍

[@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 :-)

[@kevinramirez6772]

The most helpful video I ever seen

[@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!

[@MT-rc3gn]

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

[@riceburner4747]

Hello Eric. Great video! U are always interesting👍

[@Ro-bp4rs]

Muy bien explicado

[@osbaldoa.castro488]

Thank you.👍🏽

[@gearhead3500]

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

[@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.

[@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.

[@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.

[@user-uh3mu9kj1p]

Thank you

[@turbyturbo1]

Good stuff

[@neelrivera2010]

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

[@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

[@williamrosario6369]

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

[@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

[@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?

[@plankton199]

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

[@xandao]

Perfect!

[@naimoura]

Thanks

[@Ghostygoon]

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

[@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?

[@orlandosaldarriaga5049]

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

[@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??

[@santosmoreno9656]

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

[@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

[@ramonvelazco4884]

Diablos amigo eres un genio

[@bdeme3759]

Ur beard will never misfire!

[@elkuartostudio]

So, everything can cause a misfire😢

[@TimR1216]

What about O2 sensors??

[@mikemike4737]

You forgot to mention misfire causes on one bank only like on a v6 or v8 where only one bank has P0300 which can also be caused by a bad or clogged vvt selenoid.

[@mariscalf2412]

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

[@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 🙏

[@seanm2216]

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

[@omariengram5693]

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

[@user-cw7pm4vc1x]

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

[@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

[@edwardcruz4039]

Is TRQ a good parts brand

[@kisoshi898]

Can cheap gas cause a misfire code?

[@fastracer1291]

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

[@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

[@robinhockett1191]

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

[@perlaalmaraz9574]

Cuánto vale

[@EppingForest304]

👍🙏

[@TRQ]

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

[@myfavorites1016]

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

[@bossone1216]

Just clear the code and sell the car at this point. Otherwise by the time you're done diagnosing you dien spent thousands at a shop

[@jeffhollers]

Would the flashing be the coil packs or fuel injectors

[@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