VOLVO
ECM-25BD - Front 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?
Although the fault is shown as a signal that is too low, the difference between the two sensors is what counts. If the front oxygen sensor shows a lean mixture while the rear shows a rich one, the code is set. The fault may sit in either of the two circuits.
Mulige årsaker
- Air leakage in the exhaust system
- The front oxygen sensor indicates an incorrectly rich mixture
- Damaged oxygen sensor
Hva du kan gjøre
- 1Look for air leaks in the exhaust system, especially upstream of the lambda sensors
- 2Read the code, clear it and road test the car to see whether it returns
- 3If the exhaust is sealed but the fault remains, have a workshop check the lambda sensors
- 4Have a workshop replace the lambda sensors if the fault returns after these checks
Symptomer du kan merke1
- Malfunction indicator lamp (MIL) on
Hva feilen kan påvirke2
- Oxygen sensor control is switched off
- Catalyst diagnostics are switched off
Generell veiledning for bileiere. Feilsøking på bilen kan peke på en annen årsak.