I have the service engine soon light on. i had it scanned and it came up with the code P0155. I looked at the code list on the form and it is for the Heated oxygen sensor bank 2 sensor 1. i was wondering if some one can tell me which sensor it is. The vehicle has 132000 miles and it doesn't look like they have ever been replaced.

I would apprecaite any input.

Thanks,
Dan