choard Posted September 30, 2012 Share Posted September 30, 2012 I have a 2008 Subaru Legacy 2.5i. It threw a code the other day. Forgot the number, but it was one of two problems. o2 senor or catylic convertor. I want to start at the o2 sensor. I know there are 2 sensors on the car, upstream and downstream. How can I go about figuring out which sensor has the problem? Link to comment Share on other sites More sharing options...
Osei Posted September 30, 2012 Share Posted September 30, 2012 Probably 0420. More often than not it is the O2 sensor. Bank one sensor 1 is up, sensor 2 is down. Denso or Bosch. O. Link to comment Share on other sites More sharing options...
Recommended Posts
Archived
This topic is now archived and is closed to further replies.