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Home >> Chrysler >> 2021 >> Voyager LX, Gas >> Repair and Diagnosis >> Transmission >> Automatic Trans >> 948TE/9HP48 Automatic Transmission - DTCS P0219-00 To P1728-00 >> DTC Troubleshooting >> P0643-00-Sensor Reference Voltage 1 Circuit High >> Possible Causes

Possible Causes

Possible Causes
9-VOLT SUPPLY CIRCUIT OPEN
9-VOLT SUPPLY CIRCUIT SHORTED TO VOLTAGE
9-VOLT SUPPLY CIRCUIT SHORTED TO GROUND
TRANSMISSION RANGE SENSOR (TRS)
OUTPUT SHAFT SPEED SENSOR
INPUT (TURBINE) SPEED SENSOR
TRANSMISSION CONTROL MODULE (TCM)

Always perform the PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE before proceeding. Refer to  PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE  .