97BLKMAXSE

CEL came on a while ago, said i needed rear O2 sensor. Replaced sensor, reset ECU and light did not go off. Disconected battery and CEL will still not turn off. Does anyone have any suggestions. thank you.

NmexMAX

iTrader: (22)

Check the code again. It might be your catalytic convertor.

96blkonblkse

iTrader: (18)

have you tried clearing the code with some sort of OBD-II device like the consult 2 or etc?

97BLKMAXSE

the code reads the same, rear O2 sensor. could that mean that i need a new cat?

scrhale

No I think that means either you reinstalled it incorrectly or you just have to have the ECU reset properly. Pulling the battery won't do it. You need to either turn the screw a couple of times or you need to goto autozone and have it reset.