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Originally Posted by nynor
some of the early 944's had a three wire, depending on where they were sold. my '83, for example, was sold originally in california, with california emissions, and had the three wire O2 sensor.
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According to CarFax it was originally bought in New Jersey. The only other state it has been registered in is Connecticut. I only saw one wire hanging down in the vicinity, but I didn't do an exhaustive search.
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i believe it is possible to hook up a 3-wire to a one wire sensor. the other two wires are to heat the sensor at start up.
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Is there a way to hook up the heater wires so that the advantages of the 3-wire sensor can be had or would a 3-wire sensor in a 1-wire car end up being used as if it were just a 1-wire sensor?