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 Indicator Lamp (MIL) illumination. Upon further investigation the Technician may find that any the following Diagnostic Trouble Codes have been set:
? P0300- Multiple Cylinder Misfire
? P0302- Cylinder 2 Misfire
? P0304- Cylinder 4 Misfire
? P0306- Cylinder 6 Misfire
