VOLVO
ECM-240D - Front heated oxygen sensor (HO2S), bank 1, heating. Signal too low
System
Motorstyring (ECM)
Volvo-modeller feilkoden gjelder for
Gjelder følgende modeller:
2 modellerS40 (2004–2013), V50 (2004–2013)
Vis modeller per årsmodell og motor (2)
Hva betyr feilkoden?
The engine control module (ECM) measures the resistance in the heater circuit of the front oxygen sensor on bank 1. The code is set when that resistance is too low. Connection problems or a damaged sensor may lie behind the fault.
Mulige årsaker
- Contact resistance and oxidation in the connections
- Damaged front oxygen sensor
Hva du kan gjøre
- 1Read and clear the code, then road test to see whether it returns
- 2Check that the connector to the front oxygen sensor is secure and dry
- 3If possible, measure from the back of the connector so that it is not damaged
- 4Do not use rust solvent spray or grease in the sensor connector
- 5If the fault remains, have a workshop decide whether the front sensor needs replacing
Symptomer du kan merke1
- Malfunction indicator lamp (MIL) lit
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