What the P0715 code means?
P0715 is an OBD-II generic code for a signal error between the engine control module (ECM) and the automatic transmission control module (TCM). If the code is present, the input speed sensor does not detect the engine's (turbine) revolution speed and receives the wrong signal, failing to shift gears in accordance to the manufacturer's parameters.
What causes the P0715 code?
Defective Input/Turbine Speed Sensor
Defective Shift Solenoids
Defective Engine Coolant Temperature Sensor
Defective Valve Body
Dirty transmission fluid that restricts the hydraulic passages
What are the symptoms of the P0715 code?
Harsh or erratic transmission shift points
Failure of the transmission to shift
Decreased fuel efficiency
Speedometer (odometer) fluctuation
Common mistakes when diagnosing the P0715 code?
Mistakes range from attempting to diagnose this type of code as a vehicle speed malfunction, an internal
transmission problem, an engine misfire, fuel delivery problem, or a driveline malfunction. Technicians
report that unnecessary vehicle speed sensor replacement is the result of one particularly common misdiagnosis.
What repairs can fix the P0715 code?
Replacing the input speed sensor
Repairing damaged wiring for the input speed sensor