VOLVO
ECM-0425 - Catalytic converter temperature sensor. Faulty signal
System
Motorstyring (ECM)
Volvo-modeller feilkoden gjelder for
Gjelder følgende modeller:
2 modellerS40 (1996–2004), V40 (1996–2004)
Vis modeller per årsmodell og motor (2)
Hva betyr feilkoden?
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.
Mulige årsaker
- 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
Hva du kan gjøre
- 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
Symptomer du kan merke1
- The malfunction indicator lamp (MIL) is lit
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