With Manufacturer's Scan Tool

IMPORTANT: DO NOT disconnect the battery to clear continuous memory codes. This will erase the Keep Alive Memory (KAM) information and may cause driveability symptoms.

HOW TO CLEAR CODES

Continuous Memory Codes
Perform the Key On Engine Off (KOEO) self test. When the codes begin to be displayed, deactivate the self test (refer to scan tool manual for procedure). The continuous memory codes are now erased from the computer's memory.

Automatic Clearing of Continuous Memory Codes
Codes indicating faults that have not occurred in 40-80 engine warm-up cycles are automatically erased from KAM.

On Demand (Hard) Codes
On demand (hard) codes are not stored in the continuous memory and are automatically cleared at the end of every self-test.