VOLVO
ECM-232C - Rear heated oxygen sensor (HO2S), bank 2. Signal too high
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 above its permitted range. The fault can come from the signal or ground wire touching a supply voltage, or from a damaged sensor. Oxygen sensor control is switched off while the fault is present.
Mulige årsaker
- Short-circuit to supply voltage in the signal wire
- Short-circuit to supply voltage in the ground wire
- Damaged rear oxygen sensor
Hva du kan gjøre
- 1Read and clear the code, then road test to see whether it comes back
- 2Look for chafed wiring near the sensor where the signal or ground wire may have touched a live part
- 3With the sensor connector unplugged, use a multimeter to check whether the ground wire has voltage to the body when the ignition is on
- 4If you have a diagnostic tool: see whether the bank 2 sensor signal stays constantly high and does not move while the engine runs
- 5If the fault remains after these checks, have a workshop decide whether the sensor should be replaced
Symptomer du kan merke1
- Malfunction indicator lamp (MIL) lit
Hva feilen kan påvirke2
- Rear oxygen sensor control after the catalytic converter is switched off
- Catalytic converter diagnostics are switched off
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