Scantool Diagnostics

Monitor DTC Status

NOTE:
If any DTCs related to injectors, HO2S, ECT (Engine Coolant Temperature) Sensor, Throttle Position sensor or Mass Air Flow Sensor are stored, do ALL REPAIRS associated with those codes before proceeding with this troubleshooting procedure.
If the misfire rate is high enough to cause possible catalyst damage (if the MIL was blinking), ensure that the monitoring for DTC P0420 is completed and passed after verifying the misfire repair.

1. Connect GDS and select "DTC Analysis" mode
2. Click "DTC Status" on the menu bar to see DTC's information.
3. Confirm that "DTC Readiness Flag" indicates "COMPLETED". If not, drive the vehicle within conditions noted in the freeze frame data or enable conditions.
4. Read "DTC Status" parameter.




5. Is parameter displayed "History (Not Present) fault"?

NOTE:
- History (Not Present) fault : DTC occurred but has been cleared.
- Present fault : DTC is occurring at present time.