P0303 Code – Cylinder 3 Misfire Detected

Code P0303 Possible Causes
Incorrect fuel pressure
Insufficient cylinder 3 compression
Intake air leak
Clogged or faulty fuel injector 4
Faulty ignition coil 4
Faulty spark plug 4
Fuel injector 4 circuit poor electrical connection
Fuel injector 4 harness is open or shorted
Ignition coil 4 circuit poor electrical connection
Ignition coil 4 harness is open or shorted

Need help with this code? Our mechanics are available within west Michigan to help. Outside of our service area? Visit our Car Help Section where you can ask questions and get answers.

Leave a Reply