Possible Causes
| Possible Causes |
|---|
| VACUUM LEAK |
| PCV VALVE OR HOSE LEAKING OR RESTRICTED |
| RESTRICTION IN THE EXHAUST SYSTEM |
| INTERNAL ENGINE MECHANICAL COMPONENTS |
| RESISTANCE IN THE 5-VOLT SUPPLY CIRCUIT |
| RESISTANCE IN THE MAP SIGNAL CIRCUIT |
| RESISTANCE IN THE MAP SENSOR GROUND CIRCUIT |
| MAP SENSOR |
| THROTTLE BODY - OBSTRUCTION OR FOREIGN OBJECT/MATERIAL |
| POWERTRAIN CONTROL MODULE (PCM) |
Always perform the PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE before proceeding. Refer to PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE .