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Home >> Dodge and Ram >> 2009 >> Durango Base, 3.7 K >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 14 (Powertrain Control Module (Pcm) - Electrical Diagnostics - 545RFE) >> DTC Troubleshooting >> P0871-Od Pressure Switch Rationality >> Possible Causes
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Possible Causes

WARNING: This page is about a different variant/trim than selected.
Possible Causes 
RELATED DTCS PRESENT
LINE PRESSURE DTCS PRESENT
NO. 4 OR 6 CHECK BALL CUT OR DAMAGED
(T9) OD PRESSURE SWITCH SENSE CIRCUIT OPEN
(T9) OD PRESSURE SWITCH SENSE CIRCUIT SHORTED TO GROUND
(T9) OD PRESSURE SWITCH SENSE CIRCUIT SHORTED TO ANOTHER CIRCUIT
LOW LINE PRESSURE
WIRING AND CONNECTORS
CUT OD/REV PISTON SEAL
BROKEN OR MISSING OD/REV PISTON BLEED ORIFICE
BROKEN REACTION SHAFT SUPPORT SEAL RING
POOR MACHINING ON PUMP VALVE BODY FACE
BROKEN OR MISSING DRIBBLER ORIFICE ASSEMBLY IN REACTION SHAFT SUPPORT
TRANSMISSION SOLENOID/TRS ASSEMBLY
CUT OD ACCUMULATOR PISTON SEAL
CRACKED OD ACCUMULATOR PISTON
BROKEN OR MISSING OD BLEED ORIFICE IN MAIN VALVE BODY
POWERTRAIN CONTROL MODULE (PCM)

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

GEAR  L/R  2C  4C  UD  OD 
REVERSE  OPEN OPEN OPEN OPEN OPEN
P/N  CLOSED** OPEN OPEN OPEN OPEN
1ST  CLOSED* OPEN OPEN CLOSED OPEN
2ND  OPEN CLOSED OPEN CLOSED OPEN
2ND PRIME  OPEN OPEN CLOSED CLOSED OPEN
3RD  OPEN OPEN OPEN CLOSED CLOSED
4TH  OPEN OPEN CLOSED OPEN CLOSED
5TH  OPEN CLOSED OPEN OPEN CLOSED
*L/R is closed if output speed is below 100 RPM in Drive and Manual 2. L/R is closed in Manual 1.
**May be open when rolling in Neutral or at low oil temperatures.