VOLVO
ECM-0038 - Rear heated oxygen sensor (HO2S), bank 1 heating. Signal too high
System
Motorstyring (ECM)
Volvo-modeller feilkoden gjelder for
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Gjelder følgende modeller:
3 modellerC30 (2007–2013), S40 (2004–2013), V50 (2004–2013)
Vis modeller per årsmodell og motor (3)
Hva betyr feilkoden?
The ECM watches the heater circuit of the rear oxygen sensor on bank 1. The voltage in the heater circuit is higher than allowed, which the ECM treats as a fault. Most often the signal wire is shorted to supply voltage, but the sensor itself may also be damaged.
Mulige årsaker
- Signal wire shorted to supply voltage
- Damaged rear oxygen sensor
Hva du kan gjøre
- 1With the ignition off, unplug the rear oxygen sensor connector and check the contacts for looseness, contact resistance and oxidation
- 2With the ignition on and the connector unplugged, measure the heater signal wire with a multimeter; voltage there indicates a short to supply voltage
- 3If the fault remains after erasing codes and a test drive, have a workshop check and replace the oxygen sensor if needed
Symptomer du kan merke1
- Malfunction indicator lamp (MIL) lights up
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