Skip the auto shop - Our mechanics make house calls

Q: Car has trouble starting and misfires.

asked by on

Cylinder 6 is misfiring on my car. I get an OBD-II code of P0306. I also have trouble starting the car and it jerks at times. From looking around online, I think I need a new ignition coil.

A: A new ignition coil is a very likely suspec...

A new ignition coil is a very likely suspect for this issue. I would recommend enlisting the assistance of a YourMechanic technician to diagnose your issue. Have the technician switch the suspect ignition coil with a known good one and reset the check engine light. Drive the vehicle until the check engine light comes back. If the code changes to a different cylinder, the ignition coil is bad. If the code remains the same, the spark plug could be bad or an issue with the wiring for the ignition coil. Be sure to have the technician check all areas thoroughly.

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・Fair and transparent pricing

Get a quote

What others are asking

Q: Jeep misfiring and stalling.

The code P0455 could be the gas cap is loose or leaking or a leak in the fuel tank venting system. Also a problem with a sensor or solenoid leaking in the system. The system would have to be tested...

Q: Door lock cylinder - 2004 Honda Accord

Hello. You should be able to replace the original key without an issue. The problem would be getting it programmed to work with your car. It would be better to get the lock fixed just in case the remote stops...

Q: Don't understand CEL Codes.

The codes P0300 through P0306 are for misfires of random cylinders or different cylinders. The second code P1456 is for the evaporative fuel tank system having a leak somewhere in the system. Since you are getting random misfires, then I...

Related articles

P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...
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...
What are the Car Pool Rules in Hawaii?
Hawaii is widely regarded as a land of vacation and relaxation, and as such, its scenic roads and routes are far better known than the state’s freeways. But, as with all...