VOLVOUU All Engines (2013 Emissions) Fault Code: P040901 PID: EMS EGR Differential Pressure Sensor
This Diagnostic Trouble Code (DTC) monitors and evaluates malfunctions in the (EGR) Exhaust Gas Recirculation Diff Pressure. A faulty (EGR) Exhaust Gas Recirculation differential Pressure can lead to uneven running and response problems.
Conditions for diagnostic trouble code (DTC):
1) General Electrical Failure
Observable symptoms
1) The exhaust brake does not function
Probable cause
1) Sensor
2) Damaged wiring harness
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