CA emissions headache - new cat

Swap both sensor 2s with each and see if the code follows the sensor. Also see if you can look at cross counts and do some research on what is normal. Been a long time since I looked into o2s but that is where I would start.

Excellent idea. When I tried to swap them through, the wires are two different lengths; one won’t reach. Guess that’s why there’s two part numbers.
 

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