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Re: '95 mercury Sable 3.8 O2 Sensor question
Posted to Technical Discussion Forum on 11/17/2008 1 Reply

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Hello Bob. The 12V you are seeing on the purple wire is the power supply for the heater . This does not show up on the scanner. The GY/LB wire is the one reporting to the PCM which is what is being r... Login to read more.

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