Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSJEEP2024GRAND CHEROKEE L LIMITED, RWDREPAIR AND DIAGNOSISTRANSMISSIONTRANSMISSION CONTROL SYSTEMS(ELECTRONIC SHIFT MODULE (ESM) - ELECTRICAL DIAGNOSTICS)DTC TROUBLESHOOTINGU0129-00 LOST COMMUNICATION WITH BRAKE SYSTEM CONTROL MODULE 1
2024 Jeep Grand Cherokee L Limited, RWD
U0129-00 Lost Communication With Brake System Control Module 1
2024 Jeep Grand Cherokee L Limited, RWDSECTION U0129-00 Lost Communication With Brake System Control Module 1
The COMMUNICATION DIAGNOSTIC PROCEDURE MUST be performed before replacing any component(s) or module(s). Perform the COMMUNICATION DIAGNOSTIC PROCEDURE. Refer to COMMUNICATION DIAGNOSTIC PROCEDURE .
RENDER: 1.0x
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.