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Clearing Diagnostic Trouble Codes

NOTE: If hand-held tester switches ECM from normal mode to check mode or vise versa, or if ignition switch is turned from ON to ACC or OFF during check mode, DTCs and freeze frame data will be erased.

The DTC and freeze frame data will be erased by either action:

  1. Operating OBD II scan tool (complying with SAE J1978) or hand-held tester to erase codes. For operating instructions, see OBD II scan tool's instruction book.
  2. Disconnecting battery terminals or EFI 1 fuse.

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