DTC ECM-431A

Condition
The engine control module (ECM) checks the function of the pump by measuring the current through the leak diagnostic pump. Diagnostic trouble code (DTC) ECM-431A is stored in the control module if the engine control module (ECM) registers that the voltage curve is rough. The engine control module (ECM) interprets this as damage to the reference leak in the pump.

Diagnostic trouble code (DTC) ECM-431A can be diagnosed when the leak diagnostic is run.

Substitute value
- None.

Possible source

Faulty signal:
- Defective leak diagnostic pump
- Dirt or damp in the pump
- The heater element in the pump is damaged.

Fault symptom[s]
- None.