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Possible Causes

Possible Causes 
MODULATION PRESSURE SOLENOID CONTROL CIRCUIT OPEN
MODULATION PRESSURE SOLENOID CONTROL CIRCUIT SHORT TO GROUND
MODULATION PRESSURE SOLENOID CONTROL CIRCUIT SHORT TO ANOTHER CIRCUIT
MODULATING PRESSURE CONTROL SOLENOID VALVE
TRANSMISSION CONTROL MODULE

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

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