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need help determaining what these codes could mean


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I need some help, I've been having the Traction control light staying on, and the ABS light coming on and off every so often, it annoyed me to the point of where i decided to reset the codes and took about a 200mile ride over about 3days. and i got the new codes and their description, the ones that showed up as "current" are labeled with current near them, the rest came up as history but they obv arent exactly history if i got them again XD

MSM -

B1860 - Driver Lumbar Vert Sensor Circuit Malfunction

SDM -

B1163 - Loss of Serial Data-No Lamp Response

U1040 - Loss of Class 2 Communications with ABS

U1255 - Class 2 Communication Malfunction (Serial Data Line Malfunction)

PCM -

P1520 - Transmission Range Switch Circuit *current*

P1571 - Traction Control Torque Request Circuit *current*

P1602 - Knock Sensor (KS) Module Performance

IRC -

U1144 - Loss of Communications with PHN

IPM -

U1066 - Loss of Communications with RIM

IPC -

U1301 - Class 2 Short to Battery

DIM -

U1066 - Loss of Communications with RIM

AMP -

U1064 - Loss of Communications with DIM

U1128 - Loss of Communications with IRC

ABS -

C1236 - Low System Supply Voltage

C1277 - Requested Torque Signal Circuit Malfunction *current*

U1056 - Loss of Communications with RSS

U1016 - Loss of Class 2 Communication with VCM

also, alot of times when im going up a steep incline and put my foot on the peddle harder, my music will turn off and at times a "beep" will sound after the music turns off along with the ABS light flashing on for a moment then shutting off, then my music will come back on.

the engine its self sounds amazing in my opinion. starts up in the first 1-2 seconds of turning the key in the ignition.

Thank you to anyone that can offer help

Edited by crazyfurie
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Take off the battery cables (BOTH OF THEM) and clean them "GOOD"

The Red one is more than one piece...separate it and clean all of the pieces.

A lot of your codes are loss of communication...that "MAY" be caused by nothing more than dirty or loose battery cable.

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That is what Jim was saying, your connections could be dirty, especially the positive cable they need cleaning and tightening, Take the connections apart, thank the red insulator off and clean them with battery terminal cleaner and a wire brush, any white acid/corrosion needs to go

Then check the battery, have it load tested

Pre-1995 - DTC codes OBD1  >>

1996 and newer - DTC codes OBD2 >> https://www.obd-codes.com/trouble_codes/gm/obd_codes.htm

How to check for codes Caddyinfo How To Technical Archive >> http://www.caddyinfo.com/wordpress/cadillac-how-to-faq/

Cadillac History & Specifications Year by Year  http://www.motorera.com/cadillac/index.htm

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