Hey guys so I got a P2A00 code for bank 1 sensor 1 and replaced it with the correct sensor but the gas mileage still sucks. The CAT keeps showing up as not ready even after disconnecting battery and following the drive cycle several times and still driving everyday for a few days. So I had my mechanic check the MAF sensor, exhaust, intake, and fuses for the problem but everything was ok. So he hooked it up to an electronic device and checked all the sensors which are all working properly But found that the HO2S2 Monitor on Bank 1 is detecting a lean mixture. He said it is definitely the catalytic converter anyone have any experience with this?