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Home >> Chrysler >> 2011 >> 300 C, 4WD >> Repair and Diagnosis >> External Pages >> Different car >> Section 208 ((Transmission Control Module (TCM) - Electrical Diagnostics - As68RC Automatic Transmission)) >> DTC Troubleshooting >> P1720-Loss Of Output Speed / Wheel Speed >> Possible Causes

Possible Causes

WARNING: This page is about a different car, the 2012 RAM Pickup and 2012 RAM Cab & Chassis. However, it is still accessible from the selected car via links, so may be relevant.
Possible Causes 
(T14) OUTPUT SPEED SIGNAL CIRCUIT OPEN
(T14) OUTPUT SPEED SIGNAL CIRCUIT SHORTED TO GROUND
(T14) OUTPUT SPEED SIGNAL CIRCUIT SHORTED TO VOLTAGE
(T14) OUTPUT SPEED SIGNAL CIRCUIT SHORTED TO ANOTHER CIRCUIT
(T72) SPEED SENSOR GROUND CIRCUIT OPEN
(T72) SPEED SENSOR GROUND CIRCUIT SHORTED TO VOLTAGE
(T72) SPEED SENSOR GROUND CIRCUIT SHORTED TO ANOTHER CIRCUIT
OUTPUT SPEED SENSOR
TRANSMISSION CONTROL MODULE (TCM)

Always perform the AS68RC Pre-Diagnostic Troubleshooting procedure before proceeding. Refer to  STANDARD PROCEDURE  .