VOLVO
ECM-P040931 - Exhaust Gas Recirculation Sensor A Circuit. FM (Frequency Modulated) / PWM (Pulse Width Modulated) Failures. No signal
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 position sensor for EGR valve A and states that no signal arrives from the sensor. The ECM monitors the PWM signal and sets the code when that signal is incorrect.
Mulige årsaker
- Fault codes ECM-P040984 and ECM-P040985 may share the same cause and should be read together
- EGR valve has jammed in the open or closed position
- Sticking EGR valve
- Damaged position sensor or damaged EGR valve
- Contact resistance or oxidation in the connectors
- Open circuit in the signal cable
Hva du kan gjøre
- 1If you have a diagnostic tool, start the engine and read the fault status for the code
- 2Check that the EGR valve has not jammed in the open or closed position
- 3Check that the connectors to the position sensor are firmly seated and not oxidised
- 4Use a multimeter to check that the signal cable to the position sensor has no open circuit
- 5Clean the EGR valve of dirt and soot if it is sticking
- 6If the fault remains, have a workshop check the position sensor and the EGR valve
Symptomer du kan merke1
- No noticeable symptoms for the driver
Hva feilen kan påvirke1
- EGR control is lost
Generell veiledning for bileiere. Feilsøking på bilen kan peke på en annen årsak.