VOLVO
ECM-P040984 - Exhaust Gas Recirculation Sensor A Circuit. Bus Signal / Message Failures. Signal below allowable range
Układ
Sterownik silnika (ECM)
Modele Volvo, których dotyczy ten kod błędu
Dotyczy następujących modeli:
5 modeliS80 (2007–), V70 (2008–), XC60 (2009–), XC70 (2008–), XC90 (2003–)
Pokaż modele wg rocznika i silnika (6)
- Volvo S80 (2007–)2007–2009Tylko silnik: D5244T4, D5244T5
- Volvo V70 (2008–)2008–2009Tylko silnik: D5244T4, D5244T5
- Volvo XC60 (2009–)2009Wszystkie silniki oprócz: B6304T2
- Volvo XC70 (2008–)2008Wszystkie silniki oprócz: B6324S
- Volvo XC70 (2008–)2009Tylko silnik: D5244T4, D5244T5
- Volvo XC90 (2003–)2013–2014Tylko silnik: D5244T18, D5244T5
Co oznacza ten kod błędu?
The fault concerns the position sensor A on the EGR valve and is set when the signal is below the permitted limit. Although the code is named as a bus or message fault, the condition concerns the PWM signal from the sensor.
Możliwe przyczyny
- Fault codes ECM-P040931 and ECM-P040985 may share the same cause and should be read together
- EGR valve has jammed in the open position
- EGR valve has jammed in the closed position
- Damaged position sensor or damaged EGR valve
- Contact resistance or oxidation in the connectors
- Open circuit in the signal cable
Co możesz zrobić
- 1If you have a diagnostic tool, start the engine and read the fault status for the code
- 2Check that the EGR valve moves freely and is not jammed in any position
- 3Check that the connectors to the position sensor are firmly seated and not oxidised
- 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 and the EGR valve
Objawy, które możesz zauważyć1
- No noticeable symptoms for the driver
Na co może wpływać usterka1
- EGR control is lost
Ogólne wskazówki dla właścicieli. Diagnostyka na samochodzie może wskazać inną przyczynę.