Suspension, Brakes and Tires Discussion, ABS & TRACTION CONTROL LIGHTS ARE ON! in Item Specific Cadillac Discussion; 99 DeVille, 111,000 miles. The abs & traction control lights are on and I lost first gear. The codes are ...
99 DeVille, 111,000 miles. The abs & traction control lights are on and I lost first gear. The codes are PCM: P0741 History
TCS: C1243 History
IRC: U1255 History
What do you think the problem is?
Thanks in advance,
P0741 - TCC (Torque Converter Clutch) System Stuck Off
P1520 - Transmission Range Switch Circuit
C1243 - BPMV (Brake Pressure Modulator Valve) Pump Motor Stalled (this caused the lights to come on)
IRC (Integrated Radio Chasis) U1255 - Class 2 Communication Malfunction (Serial Data Line Malfunction)
I don't know much about transmissions, but I wonder if P1520 is causing the P0741. I know that P0741 is whats causing you to have only one gear though. Your break pressure modulator valve is connected to the EBTCM (Electronic Brake Traction Control Module) along with its pump. Here's some useful information about the EBTCM and your whole suspension system in general.
http://www.cadillacforums.com/cadillac-suspension.pdf I guess you have to copy and paste it
I have the same problem. Checked the sensors all were ok. Turns out my water pump had been leaking onto the ABS pump and the wiring harness that plugs into the top of the ABS pump has corroded. Just my .02
Hey iam getting the same thing ..it would only come on when I would hit a bump so I played ( just unplug it ) with the left front speed sensor wrire and now the light will not go off so I scanned it and its telling me that my left front and right rear speed sensor is not working ...are they both on the same circut ?? any help guys Thanks
It's not the wheel speed sensor. It is an internal transmission problem. Usually a high mileage car. At my dealer we would recommend a SERTA rebuilt transmission. It's telling you the torque converter clutch is not engaging, eventually it will slip enough that you will notice it. Hope this helps, sorry to bear bad news.