02 sensor question
03-19-2003, 02:56 PM
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02 sensor question
Out of the 4 wires on the FRONT 02 sensor, which is the signal wire? I am hooking up my air/fuel gauge and need to know please?
Thanks,Greg
Thanks,Greg
03-19-2003, 06:49 PM
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Re: 02 sensor question
On most every 02 whether it has 1 wire or 4 signal wires are universally purple. When I got mine from autometer it came with simple wiring diagram.
03-19-2003, 06:57 PM
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Re: 02 sensor question
What did your auto meter instructions say? According to my info, the purple is hi 02 and the tan is low 02.
03-19-2003, 07:24 PM
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Re: 02 sensor question
2 of the wires go to the internal heater, and the other 2 go to air fuel.The computer sends a reference signal to the 02 (low).The amount of unburned fuel in the exhaust alters that signal giving the output signal (high). Purple is the signal output.
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