Well I was only wanting to hook up the OBDII ecu to pass emissions because they hook it up to the computer and not use the rollers. Plus, I dont see how my p28 is going to fit where the stock ecu goes behind that panel.

If I do have that sensor plugged up and I'm getting a code for it, that would mean that sensor is bad correct? How hard are they to replace and about how much do you think they cost?