Source wording can vary by vehicle and suffix. It is shown as written, not as a universal diagnosis.
CHRYSLER, DODGE, JEEP, RAM
Reported code forms P0306
3.6L Pentastar Upgrade Spark Plug Internal Crack This bulletin involves replacing all six spark plugs. Customers may experience a Malfunction Indicator Lamp (MIL) illumination. Upon further investigation, a technician…
CHRYSLER, DODGE, JEEP, RAM
Reported code forms P0306
MIL Illumination: P0300, P0302, P0304 or P0306 (X56 Warranty Extension) This bulletin involves checking for excessive cylinder leakage and replacing the cylinder head if necessary. Customers may experience a Malfunction…