P0605

DTC P0605:

DIAGNOSTIC TROUBLE CODE PO6O5
ECM, INTERNAL FAULT

Symptom of fault
Undefinable (different functions may be affected depending on internal memory fault/program fault)

Condition
When the ignition is switched ON, the ECM's program does not correspond to that originally programmed

Diagnostic procedure
Erase the diagnostic trouble code and drive the car to see whether the DTC is generated again.

- If the diagnostic trouble code is registered, remove the ECM and check its connector, particularly for backing-out of contact sleeves.
- Check the ground and voltage supply of the ECM.
- Refit the ECM, erase the diagnostic trouble code and drive the car again.
- If the diagnostic trouble code recurs, continue at "Procedure before replacing ECM".
- If the diagnostic trouble code is not registered, the action taken is correct. Otherwise the fault is intermittent in nature.