2004 Subaru OBW L.L. Bean H6. 2003 Subaru OBW L.L. Bean Former 2001 Subaru OBW VDC owner.
In my 2004 LL Bean Outback I’ve changed both front O2 sensors. I tested those 2 with a volt meter, which were showing good, and I also replaced the rear O2 sensor, with a sensor that was good when it last worked in my 2001 VDC Outback. And after all this, I still have an immediate check engine light upon start up.. with the P0031 code from the scanner. what in the world do I have to do to fix this? Happy day and hello everyone!