Possible Causes
| Possible Causes |
|---|
| POWERTRAIN CONTROL MODULE (PCM) DTCS |
| PERFORM VACUUM SIGNAL ROUTINE |
| PINCHED, CUT, OR OPEN VACUUM SUPPLY LINE |
| BRAKE VACUUM BOOSTER CHECK VALVE |
| VACUUM PRESSURE SENSOR |
| BRAKE VACUUM BOOSTER |
| INITIALIZE ANTI-LOCK BRAKE SYSTEM (ABS) MODULE ROUTINE |
| ANTI-LOCK BRAKE SYSTEM (ABS) MODULE |
Always perform the PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE before proceeding. Refer to PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE .