Diagnostic Trouble Code (DTC) Information ECM-611B

Condition 

Fig 1: Identifying Camshaft Position Control

Courtesy of VOLVO CARS OF NORTH AMERICA.

The engine control module (ECM) checks that the position of the intake camshaft (actual value) corresponds to the requested position (desired value).

The diagnostic trouble code (DTC) is stored if the requested position is not reached.

The diagnostic trouble code (DTC) is diagnosed by the engine control module (ECM) when the engine is running and the camshaft control is active.

Substitute Value 

• None.

Possible Source 

• Low oil pressure
• Poor oil quality
• Damaged reset valve
• Mechanical fault in the variable valve timing (VVT) unit.

Fault symptom[s] 

• Malfunction indicator lamp (MIL) lit.