crxcel

I recently rebuilt my B18c1 (OBD2) and when I put it back in my EG hatch I now have an engine light for O2 sensor. It comes on as soon as it starts. Weirdest thing is it runs on Crome and the O2 sensor was disabled when it was tuned cuz it was causing erratic idle. The motor has an OBD2 harness, and everything was plug and play. Used the same 02 sensor that was in there before so I dont know what would be causing it to do this.