Diagnostic trouble code (DTC) information

Condition 

Fig 1: Identifying Camshaft Reset Valve

Courtesy of VOLVO CARS OF NORTH AMERICA.

The engine control module (ECM) calculates the camshaft position in relation to the crankshaft using the camshaft position (CMP) sensor and engine speed (RPM) sensor signals. The control module adjusts the camshaft position using the reset valve. Diagnostic trouble code (DTC) ECM-5F is stored if the required change to the camshaft position takes too long.

Substitute Value 

None.

Possible Source 

• Low oil pressure in the engine
• Blocked oil ducts for the camshaft reset valve
• Defective camshaft reset valve.

Fault symptom[s] 

• Malfunction indicator lamp (MIL) lit.