VOLVO
ECM-042B - Rear temperature sensor, catalytic converter. Faulty signal
System
Motorstyring (ECM)
Volvo-modeller feilkoden gjelder for
Gjelder følgende modeller:
4 modellerC30 (2007–2013), C70 (2006–2013), S40 (2004–2013), V50 (2004–2013)
Vis modeller per årsmodell og motor (10)
- Volvo C30 (2007–2013)2007Kun motor: D4204T
- Volvo C30 (2007–2013)2008–2010Kun motor: D4204T · Kun girkasse: MMT6, MPS6
- Volvo C70 (2006–2013)2008Kun motor: D4204T
- Volvo C70 (2006–2013)2009–2010Kun motor: D4204T · Kun girkasse: MMT6, MPS6
- Volvo S40 (2004–2013)2005–2006Kun motor: D4204T, D4204T2
- Volvo S40 (2004–2013)2007Kun motor: D4204T
- Volvo S40 (2004–2013)2008–2010Kun motor: D4204T · Kun girkasse: MMT6, MPS6
- Volvo V50 (2004–2013)2005–2006Kun motor: D4204T, D4204T2
- Volvo V50 (2004–2013)2007Kun motor: D4204T
- Volvo V50 (2004–2013)2008–2010Kun motor: D4204T · Kun girkasse: MMT6, MPS6
Hva betyr feilkoden?
The engine control module (ECM) continuously compares the signal from the rear temperature sensor in the catalytic converter with a calculated value. If they do not match, the fault is set, and it is diagnosed when the ignition is switched on. The causes are poor contact in the connections, an open or shorted wiring fault, or a damaged temperature sensor.
Mulige årsaker
- Poor contact, contact resistance or oxidation at the sensor terminals
- Open circuit or short circuit in the wiring to the temperature sensor
- Damaged temperature sensor
Hva du kan gjøre
- 1Switch off the ignition and check the connector to the rear temperature sensor for looseness, contact resistance and oxidation
- 2Use a multimeter to check that the signal wire from the rear sensor has no open circuit and is not shorted to ground or voltage
- 3Also use a multimeter to check that the voltage wire to the sensor has no open circuit and is not shorted to ground or voltage
- 4If you have a diagnostic tool, read the rear sensor temperature in live data while the engine warms up and check that it rises evenly
- 5If the fault remains, have a workshop with diagnostic equipment check the rear temperature sensor and replace it if needed
Symptomer du kan merke1
- The check engine lamp lights or behaves abnormally
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