VOLVO
ECM-257C - Front heated oxygen sensor (HO2S), bank 2. Signal too high
Układ
Sterownik silnika (ECM)
Modele Volvo, których dotyczy ten kod błędu
Dotyczy następujących modeli:
2 modeleS80 (1999–2006), XC90 (2003–)
Pokaż modele wg rocznika i silnika (2)
Co oznacza ten kod błędu?
The code is set when the engine control module (ECM) sees that the pump current to the oxygen sensor on bank 2 has stopped. The sensor is then given a default value as its signal, even though the fault is shown as a signal that is too high.
Możliwe przyczyny
- Oxidation or contact resistance in the connections
- The pump current wire is broken
- The oxygen sensor on bank 2 is damaged
Co możesz zrobić
- 1Clear the code, road test the car and check whether it comes back
- 2Look at the connector at the lambda sensor: it should be seated firmly and free from oxide. Keep rust solvent spray and grease off the connector
- 3Use a multimeter to check that the pump current wire to the sensor has continuity throughout
- 4Look for breaks and chafing on the wires, especially where they lie close to heat
- 5If the wires are intact but the fault remains, have a workshop check the lambda sensor
Objawy, które możesz zauważyć1
- Malfunction indicator lamp (MIL) on
Ogólne wskazówki dla właścicieli. Diagnostyka na samochodzie może wskazać inną przyczynę.