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Home >> Fiat >> 2017 >> 500 Abarth, Automatic Trans >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 38 ((Transmission Control Module (TCM) - Electrical Diagnostics - 500)) >> DTC Troubleshooting >> U0121-00 Lost Communication With Anti-Lock Brake System (Abs) Control Module >> Possible Causes

Possible Causes

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Possible Causes
CAN BUS CIRCUITS OPEN OR SHORTED
DTCS RELATED TO BATTERY VOLTAGE, IGNITION, OR VIN MESSAGES
BRAKING SYSTEM MODULE (BSM) POWER AND GROUND
BODY CONTROL MODULE (BCM) NOT CONFIGURED CORRECTLY
BRAKING SYSTEM MODULE (BSM)
MODULE THAT SET THIS DTC
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