Thread: Need Help, ECU not reading 02 Sensor.

I cant think of anything else, hopefully someone here has an idea! Datascan hooked up, 02 Sensor reads 0. I tried datascan on my girls car and it works fine. Was getting a code for oxygen sensor as well. Have tried 2 different sensors along with now a known working 4 wire from my old se-l and still not reading anything. Car runs fine cold, when warm idle is sketchy along with constant speed driving it feels like its cutting out, guessing this is do to the 02 sensor not working. The car is a 96 G20 Turboed with a gti-r turbo 444cc injectors and cobra MAF running on JWT ECU. I am getting 12V to the yellow wire (power) ground seems fine (white wire) and the white and green isnt really reading anything.

Cheek the signal wire back to ECU with a DVOM for resistance.

There was continuity for both ground and signal

4-Wire O2 is a rear sensor.

Which O2 code do you have ?

Its a better sensor then the 3 its front

Which O2 CEL code do you have ?

From Datascan: 91-Front Oxygen Sensor Heater Circuit RH Bank

P0130 or P0135 or ???


Need somewhere solid to start

I'm dumb. I tested the ground again for continuity and it has it from the 02 plug to the ecm which its suppose then the 02 plug to actual ground and it has it there and its not suppose to be. Guessing this means I have a short to ground somewhere which doesn't make sense to me at all, but i also hate electrical shit.