VOLVO
ECM-P040931 - Exhaust Gas Recirculation Sensor A Circuit. FM (Frequency Modulated) / PWM (Pulse Width Modulated) Failures. No signal
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 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.
Możliwe przyczyny
- 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
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 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
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.