VOLVO
ECM-288A - Front heated oxygen sensor (HO2S), bank 1. Signal missing
System
Motorstyring (ECM)
Volvo-modeller feilkoden gjelder for
Gjelder følgende modeller:
2 modellerS40 (2004–2013), V50 (2004–2013)
Vis modeller per årsmodell og motor (2)
Hva betyr feilkoden?
Although the code is named signal missing, it is set when the front oxygen sensor on bank 1 reacts too slowly when the fuel and air mixture changes. The control module monitors the aging of the sensor, and the cause may be a wiring fault such as a short between the calibration and pump current cables, or an open circuit.
Mulige årsaker
- Calibration and pump current cables shorted to each other
- Open circuit in the signal cable (-)
- Open circuit in the calibration current cable
- Damaged front oxygen sensor
Hva du kan gjøre
- 1Do not use rust solvent or grease on the sensor connector. Check that the connector is secure and free from contact resistance and oxidation
- 2With the car switched off, use a multimeter to check the wires one at a time for an open circuit
- 3Use a multimeter to check that the calibration and pump current wires are not shorted to each other
- 4If the connector and wires are in order but the fault remains, have a workshop fit a new oxygen sensor
Symptomer du kan merke1
- Malfunction indicator lamp (MIL) lit
Hva feilen kan påvirke1
- Catalytic converter diagnostic is switched off
Generell veiledning for bileiere. Feilsøking på bilen kan peke på en annen årsak.