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Home >> Jeep >> 2015 >> Compass Limited, AWD, Automatic Trans >> Repair and Diagnosis >> Engine Performance >> System >> 2.0L & 2.4L - DTCS P2107 To U1418 >> DTC Troubleshooting >> DTC U0121: -Lost Communication With Anti-Lock Brake Module >> Possible Causes

Possible Causes

POSSIBLE CAUSES
CAN C BUS OPEN OR SHORTED CONDITION
ANTI-LOCK BRAKE (ABS) MODULE
TOTALLY INTEGRATED POWER MODULE (TIPM)
POWERTRAIN CONTROL MODULE (PCM)

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

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