Keep Alive Random Access Memory Reset Procedure
WARNING: This page is about a different car, the 2003 Ford Pickup, 2003 Ford F550 Super Duty, 2003 Ford F450 Super Duty, 2003 Ford Excursion, and 2003 Ford Cab & Chassis. However, it is still accessible from the selected car via links, so may be relevant.
CAUTION:
When battery is disconnected, vehicle computer may lose memory data. Driveability concerns may exist until computer systems have completed a relearn cycle. See COMPUTER RELEARN PROCEDURES article in GENERAL INFORMATION before disconnecting the battery.
Disconnect negative battery cable from battery for a minimum of 5 minutes. After RAM has been reset, DTCs P1000 and P0603 will be stored in PCM.