HO2S Sensor 1 Bank1 Sensor is what the ad says the CEL is on for in a 03 outback with 3.0 6 cylinder...Can anyone enlighten me? The car is cheap at 2200 if that is an easy fix..

The price is right..... O/2 sensor is a common code to cause a check engine light to come on. Unfortunately there are many things that can cause that particular code. Changing the O/2 is basic enough but may not fix your problem. Check for posts on this forum about faulty O/2 codes po420 . For me, if the car is clean ,with reasonable mileage I would buy it. 

Edited October 18, 20169 yr by montana tom

I replaced one on my 2001 a few years ago, was about $50 Canadian.