Skip the auto shop - Our mechanics make house calls

Q: Engine misfiring and giving me a code P0300.

asked by on

I am having multiple cylinder misfires in my car. It gives me code P0300. How do I fix the problem associated with this code?

Hi, The code P0300 is a random misfiring condition code and does not point to a single particular cylinder, but may affect the whole engine. If codes P0301 through P0308 are received then these codes point to a particular cylinder. For code P0300 the issue could be as simple as the spark plugs are worn or not gapped properly. The spark plugs being replaced if worn should fix the misfire. Another cause of this problem can be the fuel system running lean due to low fuel volume, pressure or injectors clogged. The recommendation I would give is to have a qualified technician check the computer for all codes and diagnose one or more of the issues I have mentioned.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: Engine misfiring in a 2002 Pontiac Montana

A misfire could be caused by number of problems but since you are getting the p0204 and p0203 I believe that is is probably an injector that is causing the misfire. I would replace the injector for the number 3...

Q: Sudden pulling at speeds over 40

Hi There, This may be caused by a number of things such as worn control arm bushings, bad tie rod ends (as you suspect) or even a bad wheel bearing. Any of these components when worn out or loose may...

Q: My Hummer shows code P0300 after getting gas

You may have got contaminated fuel from the gas station. The code P0300 indicates you are getting a random engine misfire. This random misfire does not point to any one cylinder misfire and indicates that the fuel may be contaminated...

Related articles

What Causes Hoses to Leak?
While the largest part of your engine is mechanical, hydraulics plays a significant role. You’ll find fluids at work in a number of different areas. Your car's fluids include: Engine oil Transmission...
How Long Does a Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
How Much Does a Mechanic Make in Vermont?
Automotive technician jobs in Vermont have an average mechanic salary of $37k, with some mechanics earning a salary of $53k.