VOLVO
ECM-25BC - Front 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?
Although the fault is shown as a signal that is too high, the ECM compares the front and rear oxygen sensors on bank 2. If the front shows a rich mixture while the rear shows a lean one, the code is set. The problem may lie in either of the two sensor circuits.
Mulige årsaker
- Air leakage in the exhaust system
- The front oxygen sensor gives an incorrect signal
- Damaged oxygen sensor
Hva du kan gjøre
- 1Check the exhaust system for air leakage, since a leak can affect the sensor readings
- 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 oxygen sensors
- 4If the fault returns after these checks, have a workshop replace the oxygen sensors
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.