2005 Subaru Outback

 

 What happened:

  A few weeks ago we replaced the steering rack on my OB. Out of carelessness, stupidity, or just didn't realize it (lets go with that one) when we dropped the exhaust pipe the drivers side O2 sensor was still connected. That little voice in my head said oh duck, there goes the sensor. Put everything together, and sure as NJ rain is full of non trippy acid, CEL came on, P0057. 191,000 mile son the car, i bought a new Denso sensor. The replacement center exactly matched the one in the car. install said sensor, clear the code, then the code came back  P0057 code is heater control circuit low bank 2 sensor 2. Just for giggles swapped )2 sensors from one bank to the other. Cleared the code, it came back. 

 

Now I am waiting for a new code reader so I can debug this better at home. 

 

Looking at the wiring diagram there isnt really much to this circuit, a slow-blow fuse, a relay, then the sensor.  The fuse tested fine with a meter.

While I wait for amazon to show up, anyone have any Ideas? 

Edited May 3, 201411 yr by nipper

Possible break in the wire that cinnwxts to the sensor wire? The wires from harness in other words?

Thats what I am thinking, as it is a simple circuit as things go.