Question

2005 Chevrolet Impala SS V8 with engine code P1133 code what is the fix? What does this code mean?

Answer 1

P1133 H02S insufficient switching Sensor 1

This mean the H02S sensor on Bank 1 is not operating up to its manufactuer setting, this usually due to the H02S degrading due to mileage and age, If a tune up has not been performed it may need one

Answer 2

P1133 Chevrolet Code - HO2S Insufficient Switching Bank 1 Sensor 1
Read more: https://www.autocodes.com/p1133_chevrolet.html