Thread: O2 sensor polarity?
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tbitz tbitz is offline
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Join Date: Feb 2001
Location: Ottawa
Posts: 786
Two white wires are most likely the heater and the black is the O2 signal. Ground comes from the metal case.

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Tony
'78 911SC with BITZRACING EFI conversion kit
Old 07-12-2005, 11:09 AM
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