VOLVO
ECM-0425 - Catalytic converter temperature sensor. Faulty signal
System
Motorsteuergerät (ECM)
Volvo-Modelle, für die dieser Fehlercode gilt
Gilt für folgende Modelle:
2 ModelleS40 (1996–2004), V40 (1996–2004)
Modelle nach Baujahr und Motor anzeigen (2)
Was bedeutet der Fehlercode?
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.
Mögliche Ursachen
- 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
Was Sie tun können
- 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
Symptome, die Sie bemerken können1
- The malfunction indicator lamp (MIL) is lit
Allgemeine Hinweise für Fahrzeughalter. Die Diagnose am Fahrzeug kann eine andere Ursache zeigen.