Diagnostic trouble code (DTC) information ECM-4380

Condition 

If the engine control module (ECM) registers that fuel filling has been carried out through the fuel level being changed, the position and installation of the fuel tank filler cap is checked. This is carried out by quicker leak diagnostics.

The check is carried out a few minutes after start if the vehicle speed is constant and exceeds 30 km/h and only if no fault is detected on the leak diagnostic unit.

The diagnostic trouble code (DTC) is stored if the engine control module (ECM) detects a leak after filling. This is interpreted as fuel tank filler cap missing or loosely installed.

This diagnostic trouble code (DTC) cannot occur alone but follows another stored diagnostic trouble code (DTC) for the fuel tank filler cap. The diagnostic trouble code (DTC) only remains during one operating cycle and lights a message in the display indicating that the fuel tank filler cap is not correctly positioned.

Substitute Value 

• None.

Possible Source 

• The diagnostic trouble code (DTC) is caused by another diagnostic trouble code (DTC) being stored in the engine control module (ECM).

Fault symptom[s] 

• Message in the display.