new trans. case p2270 and p0141 o2 sensors told will not improve gas what is the codes

Question

Tell me what's wrong with my truck

Answer 1

P02770 Lack of H02S switching  ( Bank 1 Sensor 2) Sensor indicates lean

P0411 H02S  Circuit malfunction (Bank 1 sensor 2)

The condition of this vehicle is running lean. In order for the catalytic convertor to work properly it needs to go from rich to lean , this is how it control emission. The sensor that coded up is a downstream 02 sensor or the catlytic monitor sensor. The most probable solution is a downstream 02 sensor.