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Home >> Dodge and Ram >> 2023 >> ProMaster 2500 >> Repair and Diagnosis >> Transmission >> Automatic Trans >> 948TE/9HP48 - DTCS P0219-00 To P0885-00 >> DTC Troubleshooting >> P0721-00-Output Shaft Speed Sensor Circuit Performance >> Possible Causes

Possible Causes

Possible Causes
OUTPUT SPEED SENSOR SIGNAL CIRCUIT OPEN OR HIGH RESISTANCE
OUTPUT SPEED SENSOR SIGNAL CIRCUIT SHORTED TO GROUND
OUTPUT SPEED SENSOR
TRANSMISSION INTERNAL FAILURE
TRANSMISSION CONTROL MODULE (TCM)

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

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