Volvo All Engines (2017 Emissions) Fault Code: P040984 PID: EMS EGR Differential Pressure Sensor
Volvo All Engines (2017 Emissions) Fault Code: P040984 PID: EMS EGR Differential Pressure Sensor
Circuit description
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)
Abnormal system response, most likely low flow
Observable symptoms
Possible engine de-rate
Exhaust leakage
Black smoke
Probable cause
1) Connector
2) Wiring harness
3) Clogged ports
4) EGR Cooler
5) EGR system pipe and connections
6) EGR differential pressure sensor
Detailed information
Activation
The diagnostic trouble code (DTC) is first set after 30 min when driving with varying engine loads
At idle the diagnostic trouble code (DTC) is normally not set to active
Deactivation
The diagnostic trouble code (DTC) will be shown as inactive when the ignition key is turned to the 0 position
To fully verify the repair it may be necessary to activate vehicle functions or perform a test drive
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