Skip the auto shop - Our mechanics make house calls

Q: The Check Engine Light came on, I hooked it up to my scanner and got the code P0308

asked by on

Engine seems to run fine and I don't notice anything wrong with it when Im driving... do I need to replace my ignition coil or not? What else could be the issue? I don't want to waste money having someone replace my ignition coil if that won't fix my issue. I know my CV boot is cracked so could that be causing the problem?

My car has 121000 miles.
My car has an automatic transmission.

A: This code relates to an engine misfire and ...

This code relates to an engine misfire and is not related in any way to your CV boot. The CV boot is a transmission/axle component. There are a number of things that can cause this code to register in the computer such as any of the following: a faulty spark plug or spark plug wire, a faulty coil pack, a faulty oxygen sensor, faulty fuel injectors, a bad catalytic converter or low fuel pressure. I would recommend having an expert technician, such as one from YourMechanic, diagnose your misfire to narrow down what may be causing the problem.

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

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Save up to 30%

Get a quote

What others are asking

Q: What is the best way to replace the catalytic converter?

The y pipe for the catalytic converters connects to the exhaust manifolds near the rear of the engine. There's a transmission crossmember that needs to come out and a couple of brackets, but swivel sockets help out a lot in...

Q: Car dies after a few minutes

There is a high possibility that your fuel injection unit "CFI" is malfunctioning. That is a common problem on your vehicle. If you would like help with this issue, consider YourMechanic, as a certified technician will be able to visit...

Q: What causes the ignition relay fuse to pop when key it's turned to the start position

Hello - You likely have a shorted coil or ignition module. One of the ignition components is pulling too much current blowing the fuse. Check the coils and ignition module for shorts or other conditions drawing too much current. I...

Related articles

P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the P0052 code means This code is seen when the Engine Control Module (ECM) tries to control the...
How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...