Swap Grounding Gremlins! Tips on SENSOR ground please

robcuda said

Bobzilla, until I get a good shop manual can you please tell me theoretically if I have one 'open end' sensor grd wire, can the sensors still operate properly? Or is it a ground 'loop' that the PCM must see a return for proper ground? In addition, can I simply ground this wire to the block or fender as a temporary solution?

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If the wire that is cut is the single wire going into the PCM, then all sensors using that ground will read out of range.
If the cut wire is for one sensor connection that may be missing, only that sensor will read out of range.
If you have the intake with sensors, check which connectors on your harness will connect to properly and mark those with masking tape. Then you’ll know if any are missing. It will make easier to tell what is missing. Maybe post a picture of the harness so we can see where that wire is.