Wideband Oxygen Sensor Note

Some publicly available vehicles come equipped with wideband O2 sensors. The 2002 VW GTI 1.8T is one such vehicles. I'm not quite sure about subsequent years, but what it is important to note that a wideband O2 sensor is very different technology as compared to a standard narrowband O2 sensor. A wideband O2 sensor is based on current pump technology, thus having an almost linear current output relative to the actual air/fuel ratio. A narrowband O2 is far from linear, and more closely resembles an exponential relationship to the air/fuel mixture. The point trying to be made is that offsetting wideband O2 sensors requires current offset technology as compared to narrowband O2 sensors requiring voltage offset technology.