EricTheCarGuy Explains Check Engine Codes - P0300 Random Misfire Detected

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!

While TRQ strives to make the information provided in this video as accurate as possible, it makes no claims, promises, or guarantees about the accuracy, completeness or applicability of the content. No information contained in this video shall create any expressed or implied warranty or guarantee of any particular result. All do-it-yourself projects entail some risk. It is the sole responsibility of the viewer to assume this risk. TRQ is not responsible or liable for any loss damage (including, but not limited to, actual, consequential, or punitive), liability, claim, or any other injury or cause related to or resulting from any information posted in this video.

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[johncwa]

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

[lisandromelendez]

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

[rishirammoonesar]

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

[Brian-vhgb]

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!

[dognatious]

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.

[peperodriguez]

Thanks a lot for your information bro, very helpful

[j.jarvis]

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

[kid]

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.

[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. 👍

[riceburner]

Hello Eric. Great video! U are always interesting👍

[dennistirado]

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-rcgn]

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

[neelrivera]

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

[gearhead]

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 luck finding the cause :-)

[chayomartinez]

Buen videos gracias por compartir su conosimiento

[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.

[larryh]

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.

[williamrosario]

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