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Home >> Chrysler >> 2011 >> 300 C, 4WD >> Repair and Diagnosis >> External Pages >> Different car >> Section 719 (5.7L CNG - DTCS P2135 To U147B - 2500 Hd) >> Diagnosis And Testing >> U11BC-Lost Brake Switch Message >> Possible Causes

Possible Causes

WARNING: This page is about a different car, the 2014 RAM 2500 HD. However, it is still accessible from the selected car via links, so may be relevant.
Possible Causes
BRAKE PEDAL POSITION (BPP) SENSOR
CAN C BUS CIRCUIT OPEN OR SHORTED
ANTI-LOCK BRAKE MODULE
POWERTRAIN CONTROL MODULE (PCM)

Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. Refer to  PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE  . 

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