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single wire 02 on 3 plug heated 02


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I don't believe the ECU software was written to monitor the heater circuit. That wasn't required til the late 90's. I know when I disconnected the O2 on my XT for testing, it only set the O2 code. The system was designed for a heated O2, so you will most likely have some runability issues while the vehicle is reaching operating temp. If you have emissions in your area, there is the possibility it won't pass. Personally, I wouldn't do it. Put the correct O2 in.

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