Limp Mode and RCM Codes After Interior Removal

[XanRules]

Hey y'all, I am absolutely stumped here.

Over the weekend, I stripped the interior out of my car - I removed the front and rear seats as well as much of the interior trim and the carpet in order to put down sound deadening and soundproofing. Basically everything except for the dashboard, steering wheel, and headliner came out. I also disconnected the APIM and the module below it so I could more cleanly run the wires for a backup camera I installed a few months ago. The battery was disconnected for the majority of the weekend, save for a few times when I’d re-connect it to roll a window up or down or open the trunk.

The car is mostly reassembled minus some of the plastic trim (lower B pillar, kick panels).

Since reassembling the car, it’s been in limp mode. I’ve got the wrench icon telling me “Engine Fault - Service Now,” as well as the air bag and traction control lights on the dash. Hill Assist and 911 Assist are both not working. I have confirmed that - as far as I can see, visually - everything was reconnected as far as both the seats and the seatbelts go. No water was used in the car at any point and no connections got wet. My battery terminal connections are tight, though I have not checked the voltage of the battery. No water got into the car on any of the sensors, and while I did clean the carpet while it was out, it was left out to dry in direct sunlight from Saturday morning until last night.

FORScan is giving me the following codes:
PCM Code U210B - Lost Communication Between Fuel Pump Control Module ‘A’ and Restraints Control Module
APIM Code U0151 - Lost Communication with Restraints Control Module
APIM Code 0452 - Invalid Data Received from Restraints Control Module
OCS Code U0151 - Lost Communication with Restraints Control Module
ABS Code U0151 - Lost Communication with Restraints Control Module
Restraint Control Module - Error, Unable to Read DTC
IPC Code U0151 - Lost Communication with Restraints Control Module

My guesses are:

1. The car was turned on while all the airbags were unplugged (seats removed etc) and it remembers there being a code of some sort and I need to clear it. Clearing the codes in FORScan does not remove them permanently, they come back when the car is turned off and back on again, but there may be something else going on there.
2. I somehow bumped or disconnected the RCM when removing and reinstalling the center console and/or the carpet, since the carpet passes right under the RCM.
3. There is something pressure sensitive somewhere that does not like having sound deadening foam near it (no modules are covered, only the floor itself is), or some sort of sensor connected to the B pillars where the airbag and seatbelt tensioners are that throws a code if the trim is removed.

1 or 2 seem most likely to me, but I’d love some expert input before I remove the center console again.

Thanks in advance.

 

[rallytaff]

Some people won't leave things alone and then wonder why they don't work!