When the DTC P0716 OBDII code is stored, it is because the PCM (Powertrain Control Module) has found a malfunction in the circuit that belongs to the ISS (Intake Speed Sensor), which is identified with the letter A. This designation is used on vehicles that are equipped with multiple Turbine Speed Sensors. Vehicles with multiple Turbine Speed Sensors use this designation.
This electromagnetic sensor usually has 3 wires and is used to control the input speed of the transmission. This is recognized by the PCM as the RPM (Revolutions Per Minute). It is located near the rear of the TCC (Torque Converter Clutch) and is screwed directly into the transmission case.
The turbine inlet speed is compared to the engine RPM speed, the amount of engine load, and the transmission output speed to determine the required inlet speed RPM. In case the actual turbine inlet speed does not match the required turbine inlet speed, the Check Engine lamp will turn on next to this code.