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Home › Fiat › 2021 › 500X Pop › Repair and Diagnosis › Engine Performance › System › 1.3L - DTCS U0121 To U1504 › DTC Troubleshooting › U012D-Lost Communication With Alternator Control Module › Possible Causes

Possible Causes

Possible Causes
LIN BUS CIRCUIT OPEN OR SHORTED
ALTERNATOR
POWERTRAIN CONTROL MODULE (PCM)

Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. 

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