VOLVO
ECM-P040904 - Exhaust Gas Recirculation Sensor A Circuit. General Failure Information. System Internal Failures
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 ECM follows the PWM signal from the position sensor on the EGR valve. The code is set when the signal from the sensor is incorrect, and it is named as an internal system fault. The fault can lie in the sensor's connections or in the sensor itself.
Mulige årsaker
- Contact resistance, oxidation or an open circuit in the connections
- Damaged position sensor
Hva du kan gjøre
- 1Start the engine and read the fault status with a diagnostic tool, if you have one
- 2Check that the connectors to the position sensor are firmly seated and not oxidised
- 3Use a multimeter to check that the wires to the position sensor have no open circuit
- 4If you have a diagnostic tool, read the position sensor value with the engine running and check that it changes when the EGR valve is activated
- 5Read and clear the fault code, then road test the car to see whether it comes back
- 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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