Diagnostic trouble code (DTC) information ECM-433C

Condition 

Fig 1: Identifying Leak Diagnostic Pump

Courtesy of VOLVO CARS OF NORTH AMERICA.

The diagnostic trouble code (DTC) is stored if the engine control module (ECM) registers that the signal from the pump for the leak diagnostic unit is too high.

The diagnostic trouble code (DTC) can be diagnosed when leak diagnostics is run.

Substitute Value 

• The leak diagnostic is disabled.

Possible Source 

• Short-circuit to supply voltage in the signal cable
• Damaged pump.

Fault symptom[s] 

• Malfunction indicator lamp (MIL) lit.