VOLVO
ECM-P040985 - Exhaust Gas Recirculation Sensor A Circuit. Bus Signal / Message Failures. Signal above allowable range
System
Motorstyring (ECM)
Volvo-modeller feilkoden gjelder for
Gjelder følgende modeller:
5 modellerS80 (2007–), V70 (2008–), XC60 (2009–), XC70 (2008–), XC90 (2003–)
Vis modeller per årsmodell og motor (6)
- Volvo S80 (2007–)2007–2009Kun motor: D5244T4, D5244T5
- Volvo V70 (2008–)2008–2009Kun motor: D5244T4, D5244T5
- Volvo XC60 (2009–)2009Alle motorer unntatt: B6304T2
- Volvo XC70 (2008–)2008Alle motorer unntatt: B6324S
- Volvo XC70 (2008–)2009Kun motor: D5244T4, D5244T5
- Volvo XC90 (2003–)2013–2014Kun motor: D5244T18, D5244T5
Hva betyr feilkoden?
The fault concerns the signal from the EGR valve position sensor, which is above the permitted limit. The code is named as a bus or message fault, but the condition is an incorrect PWM signal from the sensor.
Mulige årsaker
- Fault codes ECM-P040931 and ECM-P040984 may share the same cause and should be read together
- EGR valve is stuck in the open position
- EGR valve is stuck in the closed position
- Damaged position sensor
- Damaged EGR valve
- Contact resistance, oxidation or an open circuit in the signal cable and connectors
Hva du kan gjøre
- 1Start the engine and read the fault status with a diagnostic tool, if you have one
- 2Check that the EGR valve is not stuck in the open or closed position
- 3Check the connectors to the position sensor and the EGR valve for contact resistance and oxidation
- 4Use a multimeter to check that the signal cable has no open circuit
- 5Clean the EGR valve of dirt and soot if it is clogged
- 6If the fault remains, have a workshop check the position sensor
Symptomer du kan merke1
- No noticeable symptoms for the driver
Hva feilen kan påvirke1
- EGR control is lost
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