[94zson]

Anyone have any ideas on the following codes: P0036, P0054, P0141

1. What side is bank 1?
2. Which sensor is number 2?
3. Is it more likely the circuit or the sensor?
4. Does anyone have the factory service manual with correct diagnosis procedures for the circuit and sensor?

Any help is greatly appreciated. The truck has no driveability issues and doesn't seem to de-rate the power.

Thanks
Art