VOLVO
ECM-233D - Rear heated oxygen sensor (HO2S), bank 2. Signal too low
System
Motorstyring (ECM)
Volvo-modeller feilkoden gjelder for
Gjelder følgende modeller:
2 modellerS80 (1999–2006), XC90 (2003–)
Vis modeller per årsmodell og motor (2)
Hva betyr feilkoden?
The engine control module (ECM) controls the heating of the rear oxygen sensor on bank 2. The code is set when the signal is too low while heating is switched off. The signal wire may be in contact with ground, and a damaged sensor can also set the code.
Mulige årsaker
- Signal wire short-circuited to ground
- Damaged oxygen sensor
Hva du kan gjøre
- 1Read and clear the code, then road test to see whether it returns
- 2Inspect the signal wire for chafing or spots where it may have touched the body
- 3With the sensor connector unplugged, use a multimeter to check whether the signal wire is in contact with ground
- 4If you have a diagnostic tool: see whether the sensor signal sits low and does not move while the engine runs
- 5If the fault remains, have a workshop decide whether the sensor should be replaced
Symptomer du kan merke1
- Malfunction indicator lamp (MIL) lit
Hva feilen kan påvirke1
- Lambda control is switched off
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