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So this allows the pcm to read the actual afr?
Which wire on the wideband do you use?
The wires stated allow the PCM to read the voltage from the sensor which it then has stuff within itself to calculate out into AFR for its own use in its various ways to verify and/or maintain proper fueling.
A wideband sensor will come with its own wires out of the sensor/module and wiring diagram to show which wires to use for what.
Now if ur talkin about taking the wideband output through the O2 sensors factory wiring into the PCM for it to read, i dont very much recommend that due to the fact that most wideband outputs are 5v and the factory O2 sensors only send 1v signals... If you're gonna try to squeeze all that signal from the wideband into the 1v (which is possible either using resistors; or some wideband's outputs are programmable) its going to lose those 4v of resolution to get the tune more spot-on.
oh okay. so your just talking about the regular o2's. when you said AFR gauge i assumed wideband. I know what your talking about with the voltage. I used that to see that my O2 was bad and also to tune with STFT's.