I started getting a P0031 CEL code (HO2S Heater Control Circuit Low Bank 1 Sensor 1). Does anyone know what to do? I reckon one of my o2 sensor is kaput, but don't know which one.

05 Sep 2015

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Read this, maybe it would be helpfull.
http://www.pelicanparts.com/BMW/techarticles/BMW-3-Series-E46/26-FUEL-Oxygen_Sensor_Replacement/26-FUEL-Oxygen_Sensor_Replacement.htm

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