Possible Causes
WARNING: This page is about a different car, the 2005 Jeep Grand Cherokee. However, it is still accessible from the selected car via links, so may be relevant.
| Possible Causes |
|---|
| (K451) MDS SOLENOID NO.1 CONTROL SHORT TO GROUND |
| (K451) MDS SOLENOID NO.1 CONTROL OPEN |
| (Z42) GROUND CIRCUIT OPEN |
| INSUFFICIENT OIL PRESSURE ACTING ON THE LIFTER LOCKING PINS |
| OIL PASSAGES RESTRICTED |
| LIFTER |
| MDS SOLENOID NO.1 |
| PCM |
Always perform the PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE before proceeding.