LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Jeep >> 2009 >> Liberty Sport, 4WD, Part Time >> Repair and Diagnosis >> Transmission >> Automatic Trans >> Powertrain Control Module (Pcm) - Electrical Diagnostics - 42RLE Automatic Transmission >> DTC Troubleshooting >> P0871-Od Pressure Switch Rationality >> Possible Causes
September 30: LEMON manuals is back up on a temporary server! Slowness is possible

Possible Causes

Possible Causes 
RELATED TIPM DTCS PRESENT
LOSS OF PRIME DIAGNOSTIC TROUBLE CODE (DTC) PRESENT
(T9) OD PRESSURE SIGNAL CIRCUIT OPEN
(T9) OD PRESSURE SIGNAL CIRCUIT SHORT TO GROUND
(T9) OD 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