VOLVO
ECM-0425 - Catalytic converter temperature sensor. Faulty signal
Układ
Sterownik silnika (ECM)
Modele Volvo, których dotyczy ten kod błędu
Dotyczy następujących modeli:
2 modeleS40 (1996–2004), V40 (1996–2004)
Pokaż modele wg rocznika i silnika (2)
Co oznacza ten kod błędu?
The engine control module (ECM) monitors the temperature sensor in the catalytic converter and sets the fault when the signal stays outside its normal range for a period of time. This happens after engine braking, when the engine is warm and the engine speed is high. The cause may be contact resistance, an open or shorted signal or ground wire, or a defective temperature sensor.
Możliwe przyczyny
- Contact resistance in the connections
- Open circuit or short to ground or voltage in the signal wire
- Open circuit in the ground wire, or ground wire shorted to voltage
- Defective catalytic converter temperature sensor
Co możesz zrobić
- 1Read out the fault code, erase it and road-test to see whether it returns
- 2Switch off the ignition and check the connections to the control module and the converter temperature sensor for contact resistance and oxidation
- 3Use a multimeter to check that the wires to the temperature sensor have no open circuit and no short to ground or voltage
- 4If you have a diagnostic tool, read the catalytic converter temperature in live data during a road test and see whether the value rises as the engine warms up
- 5If the fault remains, have a workshop with diagnostic equipment check the catalytic converter temperature sensor and replace it if needed
Objawy, które możesz zauważyć1
- The malfunction indicator lamp (MIL) is lit
Ogólne wskazówki dla właścicieli. Diagnostyka na samochodzie może wskazać inną przyczynę.