Diagnostic Trouble Code (DTC) Information

Diagnostic trouble code (DTC) information ECM-4038

Condition
The engine control module (ECM) checks for leaks in the fuel system by taking a reading of the power consumption of the leak diagnosis pump during pressurization.
If a certain pressure is not achieved in the system within a reasonable time, the engine control module (ECM) interprets this as the fuel tank filler cap being incorrectly tightened or missing. The diagnostic trouble code (DTC) can never be stored alone, but is always stored together with ECM-4308, major leak.
The diagnostic trouble code (DTC) can be diagnosed when the leak diagnostic system is run.

Substitute value
- None.

Possible source
- The fuel tank filler cap is not correctly tightened or is missing.

Fault symptom[s]
- None.