With the other reassembly issues, they could have tossed the range sensor on without setting it.
Excellent point...did not think about that...
There was a tool to set it but I did not need it because the sensor had lines on it to line up...
I was thinking that you might want to get the main connector shield bolts loose some way and gain access to the connector for another look-see and buff up....(not literally) If they really are lock-tited then you need to be patient and careful...lets hope they are not...
Installing the connector only part way was an issue early on...the connector was changed on later models...and the rubber o-ring could get dislodged...and keep the connector from bottoming.
Anyway...if you can get to it and want to see into it...one thing I noticed is that the soleniod body would let fluid weep through the connector pins...and carry contaminants with it that could be conductive...I would get a mirror and look into the cavity and see if it had a pool of fluid in there...if so...I put a 90 degree bend in a blow gun and blew it out and cleaned it real good....but...you have to get the sealing o-ring put back in its groove...with a mirror and a pick tool.
Then...blow out the fluid in the harness plug and smear it with dielectric grease and carefully inset it back in there...if it goes any bit cocked then the female connectors will spread and not give you good, tight connection.
There is one other thing I would do with a problematic unit...but I am not sure if you want to tackle it...I had a method of tightening up the connections but it is involved...and a fresh pigtail harness was available to solder in instead.
So ...you can try this...but it would be good to test the STC first and then try to get codes manually just in case you have some other issue.