VOLVO
ECM-232D - 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 signal from the rear oxygen sensor on bank 2 is too low. The fault can come from the signal or ground wire being shorted to ground, but a damaged sensor can also set the code. Oxygen sensor control is switched off while the fault is present.
Mulige årsaker
- Signal wire short-circuited to ground
- Ground wire short-circuited to ground
- Damaged rear oxygen sensor
Hva du kan gjøre
- 1Clear the code after reading it and road test to see whether it returns
- 2Inspect the signal wire for chafing or places where it may have touched the body
- 3With the sensor connector unplugged, use a multimeter to confirm that the signal and ground wires have no contact with the body
- 4If you have a diagnostic tool: read the sensor signal in live data and see whether it sits at a low value without moving
- 5If the fault remains, have a workshop try a new sensor
Symptomer du kan merke1
- Malfunction indicator lamp (MIL) lit
Hva feilen kan påvirke2
- Rear oxygen sensor control is switched off
- Catalytic converter diagnostics are switched off
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