Diagnostic trouble code (DTC) information ECM-540B

Condition 

Fig 1: Identifying Oil Level Sensor

Courtesy of VOLVO CARS OF NORTH AMERICA.

The engine control module (ECM) checks the signal from the oil level sensor. The diagnostic trouble code (DTC) is stored if the engine control module (ECM) detects that there is no signal from the oil level sensor.

The diagnostic trouble code (DTC) can be diagnosed when the engine is running.

Substitute Value 

• None.

Possible Source 

• Loose connections, contact resistance or oxidation in the terminals
• Open-circuit in the signal cable
• Open-circuit in the power supply
• Damaged oil level sensor.

Fault symptom[s] 

• None.