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Home >> Chrysler >> 2011 >> 300 C, 4WD >> Repair and Diagnosis >> External Pages >> Different car >> Section 603 (3.0L Diesel - DTCS P2455-00 To U1489-00 - 1500) >> Diagnosis And Testing >> U0120-00-Lost Communication With Starter/Generator Control Module >> Possible Causes

Possible Causes

WARNING: This page is about a different car, the 2014 RAM 1500. However, it is still accessible from the selected car via links, so may be relevant.
Possible Causes
(D509) LIN BUS CIRCUIT SHORTED TO VOLTAGE
(D509) LIN BUS CIRCUIT SHORTED TO GROUND
(D509) LIN BUS CIRCUIT OPEN/HIGH RESISTANCE
GLOW PLUG MODULE
GENERATOR
POWERTRAIN CONTROL MODULE (PCM)

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