Diagnostic Trouble Code (DTC) Information

Diagnostic trouble code (DTC) information ECM-439C

Condition




If no fault has been detected in the leak diagnostic unit, the engine control module (ECM) carries out a leak diagnostic of the fuel tank system. The diagnostic trouble code (DTC) is stored if the engine control module (ECM) detects a leak which is larger than 1.0 mm.
For further information about leak diagnostics, see VIDA Design and Function.

Substitute value
None.

Possible source
- Fuel tank filler cap missing or not tightened
- Leakage that is 1.0 mm or greater in the fuel tank, fuel filler pipe, fuel tank filler cap, EVAP canister, canister purge (CP) valve, or in the hoses between these components.

Fault symptom[s]
- Malfunction indicator lamp (MIL) lit.