Clearing Codes

CAUTION: DO NOT disconnect vehicle battery to clear trouble codes. This will erase operating information from Keep-Alive Memory (KAM). Driveability problems may exist until computer systems have completed a relearn cycle. See COMPUTER RELEARN PROCEDURES article in the GENERAL INFORMATION section before disconnecting battery.

Ensure NGS scan tool is properly connected. Select vehicle and engine selection menu (optional). Select year, engine, model and any additional information requested by scan tool.
Follow operating instructions from scan tool menu. Select GENERIC OBD-II FUNCTIONS. Press CONT button if monitors are not complete.
Turn ignition on. Select CLEAR DIAGNOSTIC CODES. Press START key. All codes should now be cleared from PCM memory. If problem has not been corrected or fault is still present, hard code will immediately be reset in PCM memory.
After a properly executed PCM reset procedure, the following conditions will be met:
- All DTCs cleared from PCM memory.
- All freeze frame data cleared from PCM memory.
- All oxygen sensor test data cleared from PCM memory.
- OBD-II system monitor status is reset.
- DTC P1000 set in PCM memory.