I have an SES light. I had it scanned at autozone and they said it was 0141 heater circuit bank one sensor 2 but they did not know which sensor that was. Do you guys know which side and if its beofre or after the cat? Also I had the problem before but I do not remember the code but it was the driverside sensor before the cat. If this is a reoccuring problem is it OK to jsut buy O2 sims and quit messing with the SES, I jsut got this car and I am already missing my LT1!!! (except when I put the pedal down)

 

The bank refers to driver or passenger side, and the sensor refers to pre-catalytic converter or post-cat. B1 is driver, B2 is passenger side. S1 is pre-cat, S2 post-cat.

You can use an O2-sim on the S2's no problem - all the S2's are there for is to determine whether or not the converter is on the car. The sim merely reports a valid value to the PCM so it doesn't complain.

On the other hand, you shouldn't muck with the S1's if you have a street car. Open loop (part throttle) operation depends on them.

Seems to me I've read that emissions equipment is mandated to be warranted for a longer time than the standard 3/36 warranty GM provides. I'm not sure if O2 sensors fall into this category though. If a new part doesn't work correctly, I'd keep exchanging it for a replacement part from their parts department.

$0.02

 

Thank for your help. I think it was bank 1 sensor 1 the first time does this mean my CAT is failing?

 

No.

Only Sensor #2 monitors the Cats

Sensor #1 is the one the computer uses to run the motor