Motor Vehicle Maintenance & Repair Stack Exchange
Motor Vehicle Maintenance & Repair Stack Exchange

Questions tagged [p0300]

The P0300 is a Diagnostic Trouble Code (DTC) for "Random or Multiple Cylinder Misfire" from a vehicle's On-Board Diagnostics-II (OBD-II) system. Also include tags for your vehicle's make and model. If your question also relates to proper use of OBD-II scan tools, include the obd-ii tag too.

For questions regarding the OBD-II DTC code which is for "Random or Multiple Misfires" and can be caused by a variety of causes, including:

  • Spark plug, plug wiring, or coil pack problems
  • Throttle body or fuel injector dirty
  • Poor compression

This a generic DTC. There are codes for each cylinder from 1 through 12, such as for Cylinder #1.

Further reading can be found at:

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2009 Honda Accord 2.4l P0300 P0302 P0303 P0339

This one came in today with a check engine light on and a complaint of running rough and won't accelerate past 30MPH. Checked the codes. Some misfire freeze frame. Reset and went for a test drive. Codes P0300, P0302 and P0303 come back right away.…
Ben
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2004 Saturn ION with Ecotec 2.2: Engine misfire with code P0300, ICM problem?

Car came in with a misfire complaint and check engine light on with code p0300. Looking at misfire history confirms high misfire counts on cylinders 1 and 4 along with lower counts on cylinders 2 & 3. Fuel trims OK LTFT < 10. Plugs are…
Ben
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Random misfires and 2+3 cylinder misfires on 2009 Accord

I have a 2009 Honda Accord 2.4 L. It is reporting random misfires and cylinders 2+3 misfires. There was a thread posted about this same exact problem but was never resolved. Any help would be appreciated.
mwilliams
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2013 Subaru WRX P0300

On a Subaru 2013 since 70,000 miles I've had the fun P0300 code activated and my check engine light on, cruise and traction control disabled. I do not have any other misfire codes being shown(unlike other questions) and sometimes the misfires occur…
David Rogers
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Smog test fail, lack of oil?

I have a 2001 Toyota Corolla. It failed a smog test and it misfires. It has a code that the vehicle repair shop doesn't recognize, could this be because of lack of oil in my car? My stepson has never checked the oil and unfortunately I recently…
Susan A Peterson
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How to fix P0300 and P0304 error codes for Hyundai Accent 2009?

Make: Hyundai Model: Accent Engine: 1.6L Year: 2009 Error codes: P0300,P0304 Knowledge level: I know little about cars Help needed: Please help me find out what is going on and how to fix it.
user6625191
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How to fix P0300 and P0302 error codes for Hyundai Accent 2008?

Make: Hyundai Model: Accent Engine: 1.6L Year: 2008 Error codes: P0300,P0302 Knowledge level: I know little about cars Help needed: Please help me find out what is going on and how to fix it.
user334891
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Chasing 05 Chevy Express Flashing Engine Light P0300

Alright, I'll try to keep it brief (been through tons of threads and I thought I had it). 4 mechanics have looked at it to no avail. 2005 Chevy Express 3500 4.8L V8 130k miles Code P0300 (not sure which cylinders) Engine light flashes, but only on…
Beefi1123
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P0300 on 2017 Audi Q7

Our 2017 Q7 with the 3.0 V6 has about 100,000 miles on it now and has burned oil since we got it a year ago at 8XXXX miles. When we first got it., it burned a quart every 1500 miles. For the last couple months it's gotten worse, about a quart every…
Eric
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Misfire issue on a 2014 Infiniti QX 60

I have some issues with a 2014 Infiniti QX60 (3.5 V6) that the car repair show is unable to find. I have a misfire code P0300 (random misfire detected). Here are the issues with the car: Car is hesitating when I accelerate When I drive the car for…
Calipix974
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P0300 code (random misfire, all cylinders) but only after cold start

The past couple of times I've started my car for the first time in the day, I've had a problem with the engine running rough and sputtering, and being really down on power alongside a P0300 code flashing up (random misfire, all cylinders). Each…
el_zilcho
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how long does it take to erase OBD codes after unplugging the battery

I have been dealing with Engine Misfire codes (P0300 to P0304) on my 2003 Toyota MR2 Spyder. I changed the spark plugs and engine coils. That did not clear the codes. I used OBD scanner to erase the codes but every time I did, P0300 to P0304 kept…
Asdfg
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P3431 P0304 but engine does not feature cylinder deactivation?

2010 Dodge Grand caravan 3.8L (I think) CEL light came on and codes pulled were p0304 p0300 and p3431 , I'm curious as to what's up with the p3431. Looking it up on the typical obd sites say that it's a code for a cylinder deactivation feature.…
David Scheiber
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Intermittent overheating and P0300 at high rpm

I'm hoping someone might have some insight as to what's going on here. https://youtu.be/rhZzZZyLbd4 This is a friend's 2001 Xterra that came in with an intermittent overheating issue. While trying to replicate the overheating issue I noticed that a…
David Scheiber
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I have a pending code p0300 and my car only has rough idle and misfire on cold start but after it disappears

Hello i drive a 2007 lexus is250. I’ve been trying to fix my cars problems. I have already replaced spark plugs and ignition coils but only on cold starts and after not using the car for a while. But after it runs perfectly fine no misfires or…
Denzel Lora
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