Without Scan Tool

Clearing DTCs from Memory

The use of a scan tool is recommended to clear Diagnostic Trouble Codes (DTCs) but the below procedure may also be used.

Note: Clearing the PCM DTC memory by disconnecting the battery will clear all PCM memories. Since some operations (particularly Idle Air Control (IAC) valve idle control) are learned, it may be necessary to partially depress the accelerator pedal when re-starting the engine after PCM memory is cleared. It may also be necessary to release the accelerator pedal very slowly when first returning to idle, to prevent a stall. This will allow the PCM to re-learn IAC valve position. Learned operations may be restored by normal driving.

Battery Disconnect Procedure
^ Ignition OFF for at least 10 seconds.
^ Disconnect the negative battery cable for 30 seconds (clears status flags).