This page from Bosch ECU manual shows that code to happen when voltage is below a certain threshold (like a broken wire), but no check engine light is triggerd, just code.

 

it appears they work in milivolts, I dont know if you can just splice the wire it will cause more amperage. But it worth a try.

 

A good mechanical splice is fine, solder would be better. If doing a mechanical splice I would use some silicone grease to hold down corrosion. Shrink tubing if you have it. It is correct that a poor splice will cause problems. Two twists of green corroded copper wires is not what you want. If the conection has too much resistance the signal the ECU gets is weaker, and the ECU could interpret that as a knock so faint that no adjustment is needed.

 

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So the other wire fell off when i reached up to unplug the "wires" fron the sensor. Pretty sure this sensor wasn't doing anything. I melted some of the plastic with an old soldering iron to expose some of the metal to each connector. I soldered the wires back to the plug, covered it in some liquid tape and plugged it back into the sensor. So far, no trouble codes.

 

Savannah buzz, when you say the shield and black wire are connected, you mean those are the ones needling to be spliced together? I bought a rover from a total hack and I'm trying to repair the harness to the rh sensor. I've repaired the pink black wire but couldn't find the black. Let me know. I need to pass inspection.