Bergerb

2001 Legacy GT. Cel comes on, O2 sensor below threshold. Replaces O2 sensor 1 & 2, replaced cat. Cel comes back on every 6 months the cel comes on with same code. Now it comes on then goes off about once a month. I’m stumped.

Want to say thank you for replies. The rear diff bushings to sub frame are mushy. I’ll give update after replacing bushings.

2001 Legacy after sitting in garage overnight Put into reverse and you get a loud clunk in the rear. After driving for 1/2-1mile there is the normal sound when putting into reverse. Only clunks after sitting overnight. Rear axles are fine, drive shaft only has 3/8” rotational play. I am stumped. Fluid is fine.