I'm living overseas in southeastern europe. There is a dealer nearby in Croatia and Slovenia but it's a lot cheaper to just have a mechanic here help with my problem.
The check engine light comes on when I drive over 3 hours on the highway - it's happened a couple of times. I now just clear the error message when it comes on. It is error code P0420 - catalyst efficiency below threshold (Bank one). The dealer checked it out for 15 minutes and said I needed to replace the catalytic converter. A mechanic in Bosnia told me that the catalytic converter looked ok and I should just replace the oxygen sensor.
My question is - what is bank one on a Subaru Outback 2005 limited? How do I know which sensor to replace?
I'm nowhere close to being a car expert so appreciate any advice. oxygen sensor.JPG 129.49K 8 downloads