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 |
|---|
| (F856) 5-VOLT SUPPLY CIRCUIT OPEN |
| LINE PRESSURE SENSOR CONNECTION |
| (T140) PRESSURE CONTROL SOLENOID CONTROL CIRCUIT OPEN |
| (F856) 5-VOLT SUPPLY CIRCUIT SHORT TO GROUND |
| (T140) PRESSURE CONTROL SOLENOID CONTROL CIRCUIT SHORT TO GROUND |
| TRANSMISSION CONTROL RELAY OUTPUT CIRCUIT |
| LINE PRESSURE SENSOR |
| STUCK OR STICKING MAIN REGULATOR VALVE |
| POWERTRAIN CONTROL MODULE |
Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. (Refer to PRE-DIAGNOSTIC CHECK OUT ).