***Lateral Accelerometer. Not Accelerator. I is dumb***

Just got back from track testing the Vette post-cage install. Shop did cage, corner balance, and lowered the car about an inch.
In high speed corners with high lateral Gs I get a flickering Check Engine light that goes away when I get back on the straights. I pulled the codes and here is what I have, all H for Historical.

U1040 Loss of Communications with TCS
B2723 PASS-Key Detection Circuit
B2722 PASS-Key Detection Circuit
B0432 Rear Defogger Relay Circuit
C1295 Brake Lamp Switch Circuit Open
C1285 Lateral Accelerometer Sensor Circuit Malfunction
C1284 Lateral Accelerometer Sensor Self Test Malfunction
C1278 TCS Temporarily Inhibited By PCM
C1277 Requested Torque Signal Circuit Malfunction
C1247 Brake Pressure Differential Switch Activated

More Mods/Notes:
Wilwood AERO6R brake calipers
Running 18 square with a set of rears on the front. Tires are 315s, again square.
ABS IS working
Traction Control Mode selection working for on/off (haven't tried competition mode)

Any thoughts? Do I need to replace this sensor? Any good diagnostics I can do with a HPTuner module?

 

I would concentrate on the "U1040 Loss of Communications with TCS".
Possibly during the cage install the ground for the EBCM got loose. I would check your grounds. All the C codes are because of the loss of communication.

 

Gotcha, will do. Will add some notes up top, but I should mention that I can turn TC off (haven't tried going to Competitive Mode) and ABS is working properly.

Thank you!

 

Ok, another note. I have relocated my battery to the trunk and run 0/1 gauge to the master disconnect in the windshield cowling. I grounded the battery to the frame. Nice clean connection off a stud the roll cage welder put on there for me.
Not sure if thats important, but wanted to mention it.

So I grabbed the multimeter and flipped on ignition switches without cranking. Multimeter reads a shade under 12 volts at the B+ fusebox terminal in the old battery location. Ran a probe at the B+ fusebox location to G104 (where I believe the EBCM is grounded), and there is no drop off. So maybe not a ground?

 

I didn't like the under 12 volt reading at the B+ terminal and remembered that I left quite a bit of slack from the 8 AWG cable running from the master disconnect to the B+ terminal. I cut around 12-18 inches off the cable and now I'm reading 12.12-12.14 volts at the B+ terminal. You guys think maybe this was the issue, not enough voltage getting into the system?