LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Chrysler >> 2012 >> 300 C, RWD >> Repair and Diagnosis >> Transmission >> Transmission Control Systems >> Transmission Control Module (TCM) - Nag1 Automatic Transmission >> Diagnosis And Testing >> U1505-Implausible Message Data Length Received From FDCM >> Possible Causes
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Possible Causes

Possible Causes
BCM CAN BUS DTCS PRESENT
FINAL DRIVE CONTROL MODULE DTCS PRESENT
TRANSMISSION CONTROL MODULE (TCM)

Always perform the NAG1 Pre-Diagnostic Troubleshooting procedure before proceeding. Refer to  STANDARD PROCEDURE  .