PLX Wideband Wiring
This app note outlines
the procedures for direct replacement of your vehicle's stock narrowband oxygen
sensor with the PLX M-Series wideband oxygen sensor
while maintaining ECU narrowband closed loop operation. This setup is ideal if
you don't want to weld an additional sensor bung on to your down pipe and if you
desire to utilize the simulated narrowband output (gray wire) from the M-Series controller to maintain "like stock" ECU operation.
Not all vehicles are
equipped with a 0-1V narrowband oxygen sensor. You must first determine if your
stock oxygen sensor outputs 0-1V and conforms to the following voltage
characteristic. Otherwise, this appnote does not apply to your setup.
Click to enlarge
Typically, if your stock
sensor is a 4-wire, the outputs should match, and your setup will be compatible
(except for the RSX and Civic SI).