LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Dodge and Ram >> 2009 >> Journey R/T, AWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 2 ((Powertrain Control Module (Pcm) - Electrical Diagnostics - 40TES - GPEC)) >> DTC Troubleshooting >> P0871-Od Pressure Switch Rationality >> Possible Causes
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Possible Causes

WARNING: This page is about a different variant/trim than selected.
Possible Causes 
RELATED TCM POWER INPUT OR TRANSMISSION CONTROL RELAY DTCS PRESENT
LOSS OF PRIME DTC PRESENT
(T9) OD PRESSURE SIGNAL CIRCUIT OPEN
(T9) OD PRESSURE SIGNAL CIRCUIT SHORTED TO GROUND
(T9) OD PRESSURE SIGNAL CIRCUIT SHORTED TO VOLTAGE
TRANSMISSION SOLENOID/PRESSURE SWITCH ASSEMBLY
POWERTRAIN CONTROL MODULE (PCM)

Always perform the 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 
REVERSE OPEN OPEN OPEN
P/N CLOSED OPEN OPEN
1ST CLOSED OPEN OPEN
2ND OPEN CLOSED OPEN
DRIVE OPEN OPEN CLOSED
OD OPEN CLOSED CLOSED