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  1. E39 (1997 - 2003)
    I scanned and got these codes; p0155 is saying oxygen sensor heater ciruit bank 2 sensor 1. Should I replace both O2 sensors or would I have to do more ?
  2. E39 (1997 - 2003)
    Two codes since purchasing this car a few weeks ago and just got around to dealing with the first of them. It's a generic P0155 which is the first O2 sensor on bank #2. I believe that's the post cat sensor on right side of the car but I changed both post 02 sensors since I was there. I've...
  3. E39 (1997 - 2003)
    I got a code last week for a cam position sensor, intake side, and ordered it. Today I got a code for O2 sensor Bank 2 Sensor 1 (P0155) My question is, where is this O2 sensor located, why do I need 2 of them, and does the cam position sensor sometimes set off a code for the O2 sensor ... I...