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Home >> Fiat >> 2020 >> 124 Spider Classica, Standard Trans >> Repair and Diagnosis >> External Pages >> Different car >> Section 61 ((Drivetrain Control Module (DTCM) - Electrical Diagnostics)) >> Diagnosis And Testing >> U0100-Lost Communication With The ECM/Pcm >> Possible Causes

Possible Causes

WARNING: This page is about a different car, the 2020 Dodge Journey. However, it is still accessible from the selected car via links, so may be relevant.
Possible Causes
CONTROLLER AREA NETWORK (CAN) BUS CIRCUITS OPEN OR SHORTED
DTCS RELATED TO BATTERY VOLTAGE, IGNITION, OR VEHICLE IDENTIFICATION NUMBER (VIN) MESSAGES
POWERTRAIN CONTROL MODULE POWER AND GROUND
BODY CONTROL MODULE (BCM) NOT CONFIGURED CORRECTLY
PCM
MODULE THAT SET THIS DTC
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