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Home >> Jeep >> 2009 >> Liberty Limited, 4WD, Part Time >> Repair and Diagnosis >> Transmission >> Automatic Trans >> Powertrain Control Module (Pcm) - Electrical Diagnostics - 42RLE Automatic Transmission >> DTC Troubleshooting >> P0846-2/4 Pressure Switch Rationality >> Possible Causes

Possible Causes

Possible Causes 
RELATED TIPM TCM POWER CONTROL CIRCUIT DTCS PRESENT
LOSS OF PRIME DIAGNOSTIC TROUBLE CODE (DTC) PRESENT
(T47) 2/4 PRESSURE SIGNAL CIRCUIT OPEN
(T47) 2/4 PRESSURE SIGNAL CIRCUIT SHORT TO GROUND
(T47) 2/4 PRESSURE SIGNAL CIRCUIT SHORT TO VOLTAGE
TRANSMISSION SOLENOID/PRESSURE SWITCH ASSEMBLY
POWERTRAIN CONTROL MODULE

Always perform the 42RLE Pre-Diagnostic Troubleshooting procedure before proceeding. See  DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure  . 

PRESSURE SWITCH STATES

GEAR  L/R  2/4  OD 
R OPEN OPEN OPEN
P/N CLOSED OPEN OPEN
1st CLOSED OPEN OPEN
2nd OPEN CLOSED OPEN
D OPEN OPEN CLOSED
OD OPEN CLOSED CLOSED