Reference meaning
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.
Narrow by vehicle
A 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.
Scan worksheet →Manufacturer communications
6Original wording in English
BUICK, CHEVROLET, GMC, OLDSMOBILE
REDUCED POWER LIGHT ON AND DIAGNOSTIC TROUBLE CODE P1680 P1221 AND/OR P1271 STORED IN THE POWER CONTROL MODULE. *SC
BUICK, CHEVROLET, OLDSMOBILE, PONTIAC
FRONT WHEEL BEARING REPLACEMENTS DUE TO AN ANTI-LOCK BRAKE SYSTEM (ABS), TRACTION CONTROL SYSTEM (TCS) OR SERVICE ENGINE SOON (SES) LIGHT ON ASSOCIATED WITH FRONT WHEEL SPEED SENSOR DIAGNOSTIC TROUBLE CODES P1221, P1222, P1225, 26, C1232, OR C1233. 2001, 2002 AND 2003 MODELS. *TT *JB
CHEVROLET, GMC
SUBJECT REGARDING REVISED DIAGNOSTIC TROUBLE CODE P1221 SERVICE MANUAL INFORMATION. *TT
CHEVROLET
SUBJECT REGARDING REVISED DIAGNOSTIC TROUBLE CODE P1221 SERVIC EMANUAL UDPATE. *TT
Check vehicle applicability
41A listed vehicle is a research lead. Confirm the engine, production range and software in the manufacturer's information.
| Make | Model | Model year |
|---|---|---|
| Buick | CENTURY ↗ | Year unknown |
| Buick | RAINIER ↗ | 2005 |
| Buick | RAINIER ↗ | 2004 |
| Buick | REGAL ↗ | Year unknown |
| Chevrolet | B7 ↗ | 2002 |
| Chevrolet | B7 ↗ | 2001 |
| Chevrolet | C SERIES ↗ | 2002 |
| Chevrolet | C SERIES ↗ | 2001 |
Code meaning and manufacturer information
Original wording in English · Historical directory labels; manufacturer applicability has not been established for every entry.
Traction Control System Malfunction
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.