Does anyone know what the bank 1 sensor 1 oxygen sensor should be reading on a 2002 audi A4 1.8T?
I've used a MobyDic interface through a laptop to read the voltage and only saw a constant 0.09 reading. I'm thinking that I'm not even getting a real reading. My Bank 1 Sensor 2 seems to be reading more like a sensor 1 at levels of around 0.5, on average.
Does anyone have any experience with these readings or have any advice if I'm looking at a problem that my A4 hasn't told me about yet. I'd appreciate any input.

 

Welcome to the forum.

bank 1 sensor 1 is the precatalytic converter oxygen sensor.

How many miles on your car? Not sure about the mobydic readings, but make sure your car is operating temperature for accurate readings.