Originally Posted by 135Pats
Which o2 did you swap out? Pre-cat or post-cat? They do completely different things…Good news is, if it’s just a post-cat o2, your car should run OK. The post-cat o2 measures converter readiness, it’s the lambda o2 that you really need in functioning order.
I changed the o2 that is post cat on bank 1. The code reads something like this : Lambda probe after catalytic converter, Signal.