Possible causes

– Faulty Transmission Speed Sensor
– Transmission Speed Sensor harness is open or shorted
– Transmission Speed Sensor circuit poor electrical connection

When is the code detected?

Diagnostic Trouble Code (DTC) P0715 is detected when TCM or ECM does not receive the proper signal from the sensor.

Symptoms

– Engine Light ON (or Service Engine Soon Warning Light)
– Possible shifting problems

P0715 HUMMER Description

The input speed sensor detects the primary pulley revolution speed and sends a signal to the Transmission Control Module (TCM) and Engine Control Module (ECM).