Troubleshooting/Problems Discussion
I bought a 2011 Jeep Grand Cherokee 2011 3.6l 2WD about a month ago. The check engine light came on as soon as the ink was dry on the check. Codes P0300 P0301 P0303 P0305.
I replaced the plugs, the coils, the fuel injectors, flushed the coolant, changed the oil...now we're down to Just P0303...