VOLVO
ECM-2910 - Front heated oxygen sensor (HO2S) preheating, bank 2. Signal missing
System
Motorstyring (ECM)
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Gjelder følgende modeller:
2 modellerS80 (1999–2006), XC90 (2003–)
Vis modeller per årsmodell og motor (2)
Hva betyr feilkoden?
Although the code is named signal missing, it is set when the heating of the front oxygen sensor on bank 2 does not work within a set time after the exhaust system has reached dew point. The sensor needs heating to give a usable signal, so the fault affects the regulation.
Mulige årsaker
- Break in the supply feed from the relay that powers the heater
- Contact resistance and oxidation in the connections
- Defective oxygen sensor
Hva du kan gjøre
- 1Check that the connector at the bank 2 oxygen sensor is clean and secure, free from contact resistance and oxidation
- 2If you have a diagnostic tool: start the engine, let it idle and read the status for the front oxygen sensor. Wait if the diagnosis is still running
- 3With the ignition on, use a multimeter to check that the supply from the system relay reaches the sensor
- 4If the connector and supply are in order but the fault remains, have a workshop check the sensor and replace it if needed
Symptomer du kan merke1
- Malfunction indicator lamp (MIL) lights
Hva feilen kan påvirke1
- Fuel trim control is switched off
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