Volvo All Engines (2013 Emissions) Fault Code: P040398 PID: EMS EGR "A" Control

Circuit description
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)
Too high temperature

Observable symptoms
Loss of power

Probable cause
1) EGR Valve

Volvo All Engines (2013 Emissions) Fault Code: P040397 PID: EMS EGR "A" Control

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