Section 254 (Engine Controls - Trouble Shooting - No Codes - 2.2L): INTERMITTENTS: Notes
WARNING: This page is about a different car, the 2003 Pontiac Sunfire, 2003 Pontiac Grand Am, 2003 Oldsmobile Alero, and 2003 Chevrolet Cavalier. However, it is still accessible from the selected car via links, so may be relevant.
CAUTION:
When battery is disconnected, vehicle computer and memory systems may lose memory data. Driveability problems may exist until computer systems have completed a relearn cycle. Go to COMPUTER RELEARN PROCEDURES article in GENERAL INFORMATION before disconnecting battery.