PCM Reset Procedure

WARNING: This page does not describe the selected car, but rather 30 other vehicles, including the 2001 Mercury Sable, 2001 Mercury Mountaineer, 2001 Mercury Grand Marquis, 2001 Mercury Cougar, and 2001 Lincoln Town Car. However, it is still accessible from the selected car via links, so may be relevant.

After a PCM reset procedure has been performed, the following conditions will be met:

All DTCs will be cleared from PCM memory.
All freeze frame data will be cleared from PCM memory.
Diagnostic monitoring results will be cleared from PCM memory.
OBD-II system monitor status will reset.
DTC P1000 will be set in PCM memory until all OBD-II system monitors or components have been tested to satisfy OBD-II drive cycle without any faults occurring. To clear DTC P1000, perform DRIVE CYCLE PROCEDURES under ADDITIONAL SYSTEM FUNCTIONS. Ensure OBD-II DRIVE CYCLE PROCEDURES are performed to verify repair.

To perform PCM reset using scan tool, follow scan tool manufacturer's operating instructions. If after clearing DTCs a problem has not been corrected, or a fault is still present, a hard code will immediately be reset in PCM memory.