One problem related to automatic transmission control module has been reported for the 2004 Mercury Grand Marquis. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2004 Mercury Grand Marquis based on all problems reported for the 2004 Grand Marquis.
Stopped at red light. Engine stopped. Could not restart. Was towed to Lincoln/Mercury dealer. Diagnosis indicated failure of powertrain command module. According to service manager this failure could take place at any time or place and at any speed. Subsequent to this the heater motor blower control unit failed.
| Automatic Transmission problems | |
| Vehicle Shudder problems | |
| Automatic Transmission Cooler problems | |
| Driveshaft problems | |
| Automatic Transmission Control Module problems | |
| Power Train problems | |
| Manual Transmission Column Shift problems |