How to Erase DTC

HOW TO ERASE DTC
The diagnostic trouble code can be erased by CONSULT-II GST or ECM DIAGNOSTIC TEST MODE as described following.
^ If the battery cable is disconnected, the diagnostic trouble code will be lost within 24 hours.
^ When you erase the DTC, using CONSULT-II or GST is easier and quicker than switching the mode selector on the ECM.

The following emission-related diagnostic information is cleared from the ECM memory when erasing DTC related to OBD-II.
^ Diagnostic trouble codes (DTC)
^ 1st trip diagnostic trouble codes (1st trip DTC)
^ Freeze frame data
^ 1st trip freeze frame data
^ System readiness test (SRT) codes
^ Test values