P0121

BUICK, CHEVROLET

This Preliminary information communicates to the technician the diagnostic direction necessary to address MIL illumination with DTCs P0121, P0299, P1101 or P00C7.

BUICK, CADILLAC, CHEVROLET, GMC, HUMMER, PONTIAC, SAAB

This PI was superseded to update model years and add information concerning idle surge, reduced engine power mode, and/or DTCs P0068, P0121, P1516, P2101, P2119, and/or P2176 that may be experienced on high mileage vehicles. Please discard PIP4578.

CADILLAC

17096 - Service Update. Certain vehicles, may have a condition in which the engine air filter element does not have glue beads across the paper pleating. If this condition is present the pleats can fold over on themselves during high-RPM aggressive driving, and restrict the airflow, which may collapse the air duct and cause the …

CADILLAC

This Preliminary Information communication provides information to the technician about vehicles that the engine may shut off after wide open throttle maneuvers also the Service Engine Soon Malfunction Indicator Lamp on. Technician may find Diagnostic Trouble Codes P0121, P2101 and P2119 set. Dealer should inspect the air-filter…