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Not sure if this will post properly, but I have a P0156 code that keeps popping up. I've checked the wiring on the rear two sensors, and all looks good. Here's a short video of some live readings with my Actron:

Live O2 readings: 1996 Mustang V6 - YouTube

Anyhow, the sensors after the catalytics don't seem to show anything, ever.

Is there another harness coupling, I might not be seeing, before the individual connectors at each of the rear O2 sensors? If so, does anyone have a photo of the complete harness, for reference?

Thanks in advance....
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