P1133 Chevrolet - ODB code 1133 gas cap leak maybe?

Question

Will a code 1133 and 442 indicate a gas cap leak?

Answer 1

Hi there,

The P0442 can be caused by a faulty seal on the gas cap, the P1133 is a code for the O2 sensor, bank 1 sensor 1 heater circuit. This needs to be checked to determine the issue although normally it's a problem with the O2 sensor.