Hi. I wonder if anyone can help with a fault that I have on a Forrester 2.0 Turbo. The EML is on and has been code read showing P0031 - Oxygen sensor 1 bank 1 circuit low. I have checked the wiring for the sensor to the multiplug just before the loom and all appears to be ok with it so have changed the sensor itself. The light went out and all was good... or so I thought.

The light is now back on with the same fault which will not clear this time and I'm not sure where to go with it now. Can anyone help me with this please.

Thanks