Clearing Codes: Notes
WARNING: This page is about a different car, the 2004 Mercury Monterey and 2004 Ford Freestar. However, it is still accessible from the selected car via links, so may be relevant.
CAUTION:
DO NOT disconnect vehicle battery to clear DTCs. This will erase operating information from keep alive RAM. To clear keep alive RAM, perform KEEP ALIVE RANDOM ACCESS MEMORY RESET PROCEDURE
.