Cadillac P1571: Traction Control System - PWM Circuit No Frequency

What Does The Cadillac P1571 Code Mean?

DTC P1602 not set, engine started, engine speed over 500 rpm for 20 seconds, Traction Control active (not failed), and the PCM did not detect a PWM signal on the Desired torque circuit for 3 seconds.

What Are The Potential Causes Of The Cadillac P1571 Code?

Below are some potential causes of this DTC:

• TCS desired torque circuit is open or shorted to ground
• TCS desired torque circuit is shorted to system power (B+)
• EBCM has failed
• PCM has failed

Recommended Parts

Below are some recommended auto parts to help you address the trouble code affecting your vehicle and get it running smoothly again:

>>> WORKPRO 582-piece Crimp Terminals, Wire Connectors, Heat Shrink Tube, Electrical Repair Kit
>>> Cardone 12-10200 Remanufactured Anti-Lock Brake ABS Control Unit Module, EBCM
>>> GM Genuine Parts 12633238 Engine Control Module

Note: During the purchasing process, please check carefully whether the part you want to buy fits your car!

Reference Sources

GM, 2013, Service Bullettin – Prior To Any Circuit Testing.