P1134 GMC -

Question

will a downstream cause this code 1134

Answer 1

Hi there,

This code indicates an issue with the upstream sensor. It would normally not cause a problem with the downstream sensor. Here is some more info for you.

P1134 GMC - HO2S Transition Time Ratio Bank 1 Sensor 1

Read more: https://www.autocodes.com/p1134_gmc.html