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) Valve is not opening properly
Observable symptoms
1) Engine de-rated
2) Exhaust smoke
Probable cause
1) EGR Valve
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