P1133 code. Installed a new O2 sensor.

Question

I installed a new Denso O2 sensor in the topmost position on the drivers side exhaust of my 2008 Chevy Silverado. I still get the P1133 code. Would this not be covered by warranty on a vehicle with less than 100,000 miles? Could cleaning of the screen in the throttle body fix this?

Answer 1

P1133 02 sensor insufficient switching bank 1 sensor 1

Do a throttle body cleaning and a MAF (mass air flow) cleaning, what happens the MAF does get contaminated and leans out the system  usually you get both bank lean, Do a throttle and a MAF at least you will achieve a better idle quality,