What does this code mean?
The wording below belongs to the named make and communication. Match the complete code, reporting module, model year and engine before applying it.
A code identifies a detected condition, not a part that must automatically be replaced.
Manufacturer communications
7Original wording in English
BUICK, CADILLAC, CHEVROLET, GMC
Reported code forms P0021
This Preliminary Information communication provides information to the technician about vehicles with a Service Engine Soon Malfunction Indicator Lamp on. Technician may find Diagnostic Trouble Codes P011, P0014, P0021,…
BUICK, CADILLAC, CHEVROLET, GMC
Reported code forms P0021
CADILLAC/BUICK/CHEVROLET/GMC: DUE TO CAM ACTUATOR CODES SET - DTC P0011, DTC P0014, DTC 20024, DTC P0021 AND NO OTHER DRIVABILITY ISSUES, THE ENGINE EUN STICKER SHOULD BE INSPECTED, BEFORE REPLACING ACTUATOR. *PE
BUICK, CADILLAC, CHEVROLET
Reported code forms P0021
This Preliminary Information communication provides information to the technician about vehicles with a Service Engine Soon Malfunction Indicator Lamp on. Technician may find Diagnostic Trouble Codes P011, P0014, P0021,…
BUICK, CADILLAC, CHEVROLET
Reported code forms P0021
This Preliminary Information communication provides information to the technician about vehicles with a Service Engine Soon Malfunction Indicator Lamp on. Technician may find Diagnostic Trouble Codes P011, P0014, P0021,…
BUICK, CADILLAC, CHEVROLET
Reported code forms P0021
This Preliminary Information communication provides information to the technician about vehicles with a Service Engine Soon Malfunction Indicator Lamp on. Technician may find Diagnostic Trouble Codes P011, P0014, P0021,…
BUICK, CADILLAC, GMC, SATURN
Reported code forms P0021
DTC'S P0011, P0014, P0021, P0024, P0341, P0346, P0366, OR P0391. WITH 3.6 LY7 OR LLT. *NJ
Check vehicle applicability
7A listed vehicle is a research lead. Confirm the engine, production range and software in the manufacturer's information.
Before replacing a part
Record codes and freeze-frame data. Check battery condition, related codes and visible wiring or hose damage. Follow the vehicle's diagnostic procedure and test results before replacing parts.
Can I keep driving?
A code alone cannot establish whether driving is safe. A flashing malfunction light, severe shaking, overheating, oil-pressure warning or loss of braking or steering needs prompt attention. Stop in a safe place and seek assistance when control or engine safety is affected. Follow the vehicle handbook.