Just replaced the o2 sensors(upstream & downstream) on bank 1...got rid of the CEL on the dash but i managed to find 4-5 wires broken/shredded on the wire harness that runs between the muffler and drive shaft, i'm not really sure what they're for but it seems they've all oxidized and can't tell what color they are anymore
I'm contemplating slapping a for sale sign on this damn truck, thing is turning into a money pit!
You can see in the pics the original upstream o2 sensor compared to the new one
In the third pic you can see how little room you have to tighten/loosen the upstream(front)o2 sensor with the muffler/cat in the way
The last pic you can see the torn wires i found, i didn't have enough room to get a good pic
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