Where is then problem when a p1133 shows on test?

Answer 1

I am having the same issue on my vehicle. Everything I can find so far tells me it's a failed O2 Sensor.

If you are lucky enough to live in a state with an autozone store just go to the store or call them and they will tell you what the problem code is.

The code actually does not say it has failed but only that it is a insufficent switching bank 1 sensor 1