Diagnostic trouble code (DTC) information ECM-6140

Condition 

Fig 1: Identifying Camshaft Position Control

Courtesy of VOLVO CARS OF NORTH AMERICA.

The engine control module (ECM) checks that control of the exhaust camshaft is quick enough. This means that the exhaust camshaft (actual value) reaches the position requested by the engine control module (ECM) quickly enough. The diagnostic trouble code (DTC) is stored if the requested position is not reached within a certain time.

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