Diagnostic Trouble Code (DTC) Information

Diagnostic trouble code (DTC) information

Condition




If no fault is detected in the leak diagnostic unit, the control module runs a leak diagnostic of the fuel tank system. Diagnostic trouble code (DTC) ECM-400C is stored if the engine control module (ECM) detects a leak of 0.5-1.0 mm (minor leak) or a leak that is >1.0 mm (major leak). For more information about the leak diagnostics, see Leak diagnostics (certain markets only) Leak Diagnostics (Certain Markets Only).

Substitute value
None.

Possible source

Major leak:
- Fuel tank filler cap missing or not tightened
- Leakage that is 1 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
- The fuel gauge does not function (This fault is detected by the rear electrical module).

Minor leak:
- Leakage that is 0.5-1.0 mm or smaller in the fuel tank, fuel filler pipe, fuel tank filler cap, EVAP canister, canister purge (CP) valve, or in the hoses between these components
- The fuel gauge does not function (This fault is detected by the rear electrical module).

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