I'm getting two codes p2096 post cat fuel trim to lean bank 1 and p0133 bank 1 sensor1 slow response. I've replace front and rear bank 1 O2 sensors. Checked wiring checked vacume leaks replace upper lower intake gaskets replaced spark plugs replaced air filter. Checked exhaust for leaks. I've even used intake cleaner and ran 93 oct fuel. Nothing I do seems to get rid of these codes

 

My 06 was doing this when the cats were plugging. 36k and the front cat was 75%plugged. I ended up having custom headers built and eliminating the issue all together.

 

How can u tell if they are plugged. They don't seem to get red hot. I have no reduced power or anything

 

Mine never did either. My mileage dropped some though. By the time I took them out I could only average 16. The trailing mileage and cel were the only clues to mine. I took it to a shop and they looked into the cat with a bore scope. Most of the top of the front cat was melted over.

I then proceeded to have them make 3-1 headers, do full 2.5" exhaust, and put on a Flowmaster at the rear. It sounded very good and helped top end power.