VOLVO
ECM-0137 - Rear heated oxygen sensor (HO2S), bank 1. Signal too low
System
Motorstyring (ECM)
Volvo-modeller feilkoden gjelder for
Gjelder følgende modeller:
3 modellerC30 (2007–2013), S40 (2004–2013), V50 (2004–2013)
Vis modeller per årsmodell og motor (3)
Hva betyr feilkoden?
The engine control module has detected that the signal from the rear lambda sensor on bank 1 is below a set limit and treats this as a fault. The rear sensor is used to check that the catalytic converter works, so a signal that is too low means the sensor's reading is not right. The fault is most often a signal wire shorted to ground, or a damaged sensor.
Mulige årsaker
- Signal wire shorted to ground
- Damaged rear lambda sensor, bank 1
Hva du kan gjøre
- 1Read, note and clear the code, then road test to see whether it returns
- 2Check that the connector at the rear lambda sensor is fully engaged and free from corrosion
- 3Follow the signal wire from the sensor and look for chafing and pinched sections, especially where it runs near the exhaust pipe
- 4With the connector unplugged, use a multimeter to check that the signal wire has no connection to ground (the body)
- 5With a diagnostic tool, a rear sensor value that stays constantly low points to a signal fault
- 6If the fault returns, have a workshop with diagnostic equipment check the wiring and decide whether the sensor should be replaced
Symptomer du kan merke1
- Malfunction indicator lamp (MIL) lit
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