Jump to content

2002 downstream O2 sensor connector

Recommended Posts



I have a 2002 Legacy L Wagon. I have a persistent P0420 code, and I'm hoping it's related to the fact the downstream O2 sensor isn't connected!. The wires are clipped short off the sensor.


I've looked and looked in the engine compartment, but I don't see an empty connector. The disassembly manual shows a photo, but it's too close to tell where in the bay it is.


Link to comment
Share on other sites

It may have been swept away by road debris. A mechanic would have to be insane to cut it off. On my 95 manual trans the sensor wires are part of the trans sub harness. That connects to the main harness at the bell housing/engine joint along with the engine harness. That's where it flies over to the firewall (Subaru calls it the bulkhead in the FSM) and through to the ECU inside. I don't know on the newer units, but there is a good chance it is similar.
Link to comment
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now

  • Create New...

Important Information

Terms of Use