Did you happen to find the wiring schematics for the HO2Sensors?
I've just torn my exhaust system to bits and reassembled it with four new sensors and have tried everything else to resolve the P0051, P0031, etc codes that keep pestering me.
Thought that would do the trick for sure but nope.
Last thing to do that I've been dreading is tracing back the wires because there is no room to do it.
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