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With Generic Scan Tool (GST)

HOW TO CLEAR DIAGNOSTIC TROUBLE CODES
The diagnostic trouble code can be erased by the following methods.

1. Selecting Mode 4 with Generic Scan Tool.

^ If the battery terminal is disconnected, the diagnostic trouble code will be lost within 24 hours.
^ When you erase the Diagnostic Trouble Code (DTC), using CONSULT or GST is easier and quicker than switching the mode selector on the Engine Control Module (ECM).