Volvo All Engines (2013 Emissions) Fault Code: P040371 PID: EMS EGR “A” Control

Volvo All Engines (2013 Emissions) Fault Code: P040371 PID: EMS EGR “A” Control

The EGR Valve operation is controlled by the Engine Control Module (ECM) using a pulse width modulated signal.? The ECU provides both the power and ground circuits. The EGR Valve assembly consists of a solenoid, operating a valve by hydraulic pressure provided by the engine?s oiling system.

Conditions for diagnostic trouble code (DTC):
1) Stuck in one position

Observable symptoms
1) Loss of power
2) Black smoke

Probable cause
1) EGR Valve