The P0717 trouble code indicates that the Input or Turbine Speed Sensor A Circuit is not sending any signal to the engine control module (ECM) or transmission control module (TCM). This sensor measures the rotational speed of the input or turbine shaft inside the transmission and sends this data to the ECM or TCM. The ECM or TCM uses this information to control various transmission functions such as shifting points and torque converter lockup.
P0717 Input/Turbine Speed Sensor A Circuit No Signal
Code symptoms P0717.
1. Check Engine Light (CEL) illuminated on the dashboard.
2. Erratic shifting behavior, including delayed or harsh shifts.
3. Transmission slipping or overheating.
4. Inaccurate speedometer readings or speedometer failure.
5. Vehicle may go into “limp mode,” restricting speed and gear selection.
6. Loss of fuel efficiency.
7. Transmission may stay in one gear or fail to shift at all.
This code is common in brands such as:: Chevrolet, Renault, Ford, Toyota, Nissan, Mercedes Benz, Honda.
Causes of the code P0717.
1. Faulty input or turbine speed sensor.
2. Damaged or frayed wiring harness leading to the sensor.
3. Loose or corroded electrical connectors in the sensor circuit.
4. Poor electrical connections or intermittent short circuits in the sensor circuit.
5. Internal transmission problems.
Code Solutions P0717.
1. Inspect the wiring harness and connectors in the input or turbine speed sensor circuit for any signs of damage, looseness, or corrosion. Repair or replace damaged components and ensure tight connections.
2. Test the input or turbine speed sensor for proper operation using a multimeter or scan tool. Replace the sensor if it is found to be faulty.
3. Check the transmission fluid level and condition. Top up or replace the fluid if necessary, using the correct type specified by the manufacturer.
4. Clear the trouble codes from the ECM or TCM memory and perform a test drive to see if the issue recurs. If the CEL illuminates again with the same code, further diagnosis may be necessary.
5. Monitor the sensor circuit while the vehicle is running to identify any intermittent issues. Wiggle test the wiring harness and connectors to replicate the problem.
6. If other potential causes have been ruled out, consider consulting a professional technician or dealership for further diagnosis and repair. They may need to perform more advanced diagnostics using specialized tools.