p1133 code for chevy tahoe

Question

warm weather my car shows 91133 code , would u tell me what is the solution ?

Answer 1

HI there

DTC P1133: HO2S Insufficient Switching Bank 1 Sensor 1

This code shouldn't normally happen dependent on the outside air temp. Basically the code is saying the O2 sensor isn't showing a change in voltage like it should. Most of the time the sensor itself is the problem, although it is possible there could be other issues causing it. Leaking exhaust or a leaking intake manifold gasket could be on that list.