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U0129-00 Lost Communication With Brake System Control Module 1

WARNING: This page is about a different car, the 2024 RAM ProMaster 3500, 2024 RAM ProMaster 2500, and 2024 RAM ProMaster 1500. However, it is still accessible from the selected car via links, so may be relevant.

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 (BEV) or COMMUNICATION DIAGNOSTIC PROCEDURE (3.6L) .

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