Diagnostic trouble code (DTC) information

Condition 

Fig 1: Identifying Camshaft Position Control

Courtesy of VOLVO CARS OF NORTH AMERICA.

Diagnostic trouble code (DTC) ECM-6400 (camshaft intake) or ECM-6410 (camshaft exhaust) is stored if the engine control module (ECM) registers that the signal from the camshaft reset valve is too low or missing or is too high.

Substitute Value 

• Shutting off the variable camshaft.

Possible Source 

Signal too high 

• Short-circuit to supply voltage in the signal cable
• Defective camshaft reset valve.

Signal too low or signal missing 

• Contact resistance in the terminals
• Open-circuit in the signal cable
• Short-circuit to ground in the signal cable
• Open-circuit in the voltage supply cable
• Defective camshaft reset valve.

Fault symptom[s] 

• Malfunction indicator lamp (MIL) lit
• The engine does not start.