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Possible Causes

WARNING: This page is about a different car, the 2014 Dodge Journey. However, it is still accessible from the selected car via links, so may be relevant.
Possible Causes
RELATED TCM POWER INPUT DTCS PRESENT
LOSS OF PRIME DTC PRESENT
(T47) 2/4 PRESSURE SIGNAL CIRCUIT OPEN
(T47) 2/4 PRESSURE SIGNAL CIRCUIT SHORTED TO GROUND
(T47) 2/4 PRESSURE SIGNAL CIRCUIT SHORTED TO VOLTAGE
TRANSMISSION SOLENOID/PRESSURE SWITCH ASSEMBLY
POWERTRAIN CONTROL MODULE (PCM)

Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. Refer to  62TE - PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE   . 

PRESSURE SWITCH STATES

GEAR L/R 2/4 OD LC DC
R OPEN OPEN OPEN OPEN OPEN
P/N CLOSED OPEN OPEN PRE 2014 MY:
P/N=OPEN
2014 MY AND BEYOND:
P = CLOSED
N = OPEN
OPEN
1st CLOSED OPEN OPEN OPEN OPEN
2nd CLOSED OPEN OPEN OPEN CLOSED
3rd OPEN CLOSED OPEN CLOSED OPEN
4th Prime OPEN CLOSED OPEN OPEN CLOSED
4th OPEN OPEN CLOSED CLOSED OPEN
D OPEN OPEN CLOSED OPEN CLOSED
OD OPEN CLOSED CLOSED OPEN CLOSED