I'm looking at buying a damaged c5 to rebuild as a track-only car. It will crank up, but has a ton of codes in the DIC. Below is what I found. I'm sure there must be one major cause for the bulk of these codes right? Surely something is unplugged, or maybe this car has been flooded. Think this can be fixed? or should I move on to another car? The dash is also lit up like a christmas tree.

p1571 P1571 ASR Desired Torque
b0432 B0432 Rear Defogger Relay Circuit
b0502 B0502 RH DRL Relay Circuit
b0503 B0503 RH DRL Relay Circuit
b0508 B0508 LH DRL Relay Circuit
b2578 B2578 RF Turn Signal Monitor Circuit (Short to Voltage)
b2583 B2583 LF Turn Signal Monitor Circuit (Short to Voltage)
b2587 B2587 Column Lock/Unlock Drive (A)
b2592 B2592 Column Lock/Unlock Drive (B)
b2721 B2721 PASS-Key Detection Circuit
b2722 B2722 PASS-Key Detection Circuit
b2723 B2723 PASS-Key Detection Circuit
u1255 U1255 Generic Loss Communications
u1096 U1096 Loss of Communications with IPC
u1016 U1016 Loss of Communications with PCM
u0026 ?
u1000 U1000 Loss of Communication Undetermined
u1301 U1301 Class 2 Circuit Shorted to Battery
u1096 U1096 Loss of Communications with IPC
u1064 U1064 Loss of Communications with BCM
b2282 B2282 Battery #1 Fault
b2284 B2284 Battery #2 Fault
u1255 U1255 Generic Loss Communications
u1016 U1016 Loss of Communications with PCM
u1096 U1096 Loss of Communications with IPC
b2283 B2283 Battery #1 Fault
b2285 B2285 Battery #2 Fault
u1064 U1064 Loss of Communications with BCM
b2282 B2282 Battery #1 Fault
b2285 B2285 Battery #2 Fault
u1064 U1064 Loss of Communications with BCM
b2177 B2177 Seat Front Down Switch Shorted to GND
b0851 B0851 Battery 1 Out of Range
u1656 ?
u1300 U1300 Class 2 Circuit Shorted to Ground
u1255 U1255 Generic Loss Communications
u1096 U1096 Loss of Communications with IPC
u1064 U1064 Loss of Communications with BCM
u1016 U1016 Loss of Communications with PCM
c2120 C2120 TPM System Malfunction (No Sensors Received)

 

Ick. Unless you're getting it dirt cheap, I'd walk.

 

You already know your answer

 

What was the damage? With that many errors I'd agree with your assessment of it potentially being a flood car, or there being one large issue possibly with the main harness causing loss of comms. Wanna roll the dice? If no obvious issue was evident on inspection I'd pass .

 

 

 

The car has damage on the driver's fender, rocker panel, and in the area where the driver's door hinges are.

 

PASS...quickly !!

 

All of the Loss of Communications errors can be due to damage to the wiring harness in the drivers door/door jamb. The data bus circuit may be shorted to ground in this area as indicated by the U1300 code.
I would not worry about the C2120 code for the TPMS given how you want to use the car.
The pass-key errors may or may not be related to the data bus issue. This error would typically prevent the car from starting or continue running.

Gary

 

Thanks Gary, that sheds a ray of hope. Most of these codes were listed as "H" which after some research I now understand to mean "historical" and only 3 had a "C" for "current":

P1571 ASR Desired Torque (PCM)
B2722 PASS-Key Detection Circuit (BCM)
U1000 Loss of Communication Undetermined (SDM)

 

I agree with Gary, half the codes will disappear if you simply clear the codes. All that lost Communications stuff is just a wiring error. They're not all that difficult to find if you have the proper tools. Look into one of the switch boxes that are used for tuning. It's a gizmo that plugs in at the passenger footwell, taking the place of some jumper strips. It has a rotary switch and you can turn off all the data bus except one leg, typically used for eliminating draw on the line so you can do a PCM programming. If the bus voltage is low you can break a PCM so people use these things to safeguard against that when tuning. I have one.

if you're not afraid of a little Diagnostics and the rest of the car is good oh, I wouldn't be afraid to pick it up at a hell of a steal price so I can beat the snot out of it on a track.