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AutoCodes – GMC – P0717 GMC

P0717 GMC Code - Transmission Input Speed Sensor Circuit No Signal

Quick Answer

The Input Speed Sensor detects the primary pulley revolution speed and sends a signal to the Transmission. Common causes include Faulty Transmission Input Speed Sensor, Transmission Input Speed Sensor harness is open or shorted, Transmission Input Speed Sensor circuit poor electrical connection. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means
P0717 GMC indicates Transmission Input Speed Sensor Circuit No Signal.
Common causes
Common causes include Faulty Transmission Input Speed Sensor, Transmission Input Speed Sensor harness is open or shorted, Transmission Input Speed Sensor circuit poor electrical connection.
Severity
High - diagnose this code as soon as possible.
Can I drive?
Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
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Code Popularity 15,905
How popular is this code, among other codes? Low
What is this?
Table of contents Created and updated by William Orellana on Jul 29, 2022
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Code P0717 GMC Description

The Input Speed Sensor detects the primary pulley revolution speed and sends a signal to the Transmission. The Input Speed Sensor (ISS), also known as the transmission turbine speed sensor, is a hall-effect type sensor. The ISS mounts to the control valve upper body assembly and connects to the control solenoid (w/body and Transmission Control Module (TCM)) valve assembly through a wire harness and connector. The sensor faces the 1-2-3-4 and 3-5-R clutch housing machined teeth surface. The sensor receives 8.3-9.3 volts on the Input/Output Speed Sensor (ISS/OSS) supply voltage circuit from the Transmission Control Module (TCM). As the 1-2-3-4 and 3-5-R clutch housing rotates, the sensor produces a signal frequency based on the machined surface of the 1-2-3-4 and 3-5-R clutch housing. This signal is transmitted through the ISS signal circuit to the control solenoid (w/body and TCM) valve assembly. The control solenoid (w/body and TCM) valve assembly uses the ISS signal to determine line pressure, transmission shift patterns, Torque Converter Clutch (TCC) slip speed, and gear ratio. The Diagnostic Trouble Code (DTC) will be set when the TCM detects turbine speed is less than 61 RPM and the output speed is greater than 500 RPM for 1 s.
OBDII Code P0717 GMC - Transmission Input Speed Sensor Circuit No Signal - AutoCodes.com
P0717 GMC Code - Transmission Input Speed Sensor Circuit No Signal
What does this mean?

What are the Possible Causes of the DTC P0717 GMC?

  • Faulty Transmission Input Speed Sensor
  • Transmission Input Speed Sensor harness is open or shorted
  • Transmission Input Speed Sensor circuit poor electrical connection
  • Faulty Control Solenoid Valve Assembly

How to Fix the DTC P0717 GMC?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What does this mean?

Code Tech Notes

There is a factory service bulletin for the following GMC Models:
2007-2009 GMC Acadia
2007-2009 GMC Acadia Factory Service Bulletin OBDII Code P0717

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0717 GMC code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

Need more information about the P0717 GMC code?

Need more information on how to fix the P0717 GMC code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P0717 GMC code diagnosed by a professional: Find a repair shop in your area

Information for Specific GMC Models

About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about P0717 GMC Code

1. What are the common symptoms of OBDII code P0717 in a GMC vehicle?

- Common symptoms include erratic shifting, transmission slipping, speedometer issues, and the illumination of the Check Engine Light.

2. What could cause the OBDII code P0717 to appear in a GMC vehicle?

- The code may be triggered due to a faulty transmission input speed sensor, damaged wiring or connectors, low transmission fluid level, or a malfunctioning PCM.

3. How can I diagnose the Transmission Input Speed Sensor Circuit No Signal issue in my GMC vehicle?

- Diagnosis typically involves checking the sensor and its wiring for damage, testing the sensor's resistance, and using a scan tool to monitor sensor data while the vehicle is running.

4. Can I continue driving my GMC with the P0717 code present?

- It is not recommended to drive the vehicle with the P0717 code as it can lead to further transmission issues and potential damage. It is advisable to address the problem promptly.

5. What are the repair options for fixing the Transmission Input Speed Sensor Circuit No Signal problem in a GMC?

- Repair options may include replacing the faulty input speed sensor, repairing damaged wiring or connectors, ensuring proper transmission fluid levels, and resetting the trouble codes.

6. Is it possible to reset the P0717 code in a GMC without fixing the underlying issue?

- While clearing the trouble code may temporarily turn off the Check Engine Light, the code is likely to reappear until the root cause of the problem is addressed.

7. Can a DIY enthusiast fix the P0717 code in a GMC, or is professional help necessary?

- Depending on the individual's mechanical skills and tools available, it may be possible to address the issue DIY. However, if unsure, it is recommended to seek professional assistance.

8. Are there any preventive measures to avoid encountering the P0717 code in a GMC?

- Regularly servicing the vehicle, checking transmission fluid levels, and addressing any transmission-related issues promptly can help prevent the occurrence of the P0717 code.

9. How long does it typically take to repair the Transmission Input Speed Sensor Circuit No Signal problem in a GMC?

- The repair time can vary depending on the exact cause of the issue, availability of parts, and the individual's familiarity with the repair process. In general, it may take a few hours to complete.

10. Will fixing the P0717 code improve the overall performance and efficiency of my GMC vehicle?

- Addressing the P0717 code and ensuring the proper functioning of the transmission input speed sensor can help restore smooth shifting, improve fuel efficiency, and prevent further transmission damage.

Discuss the causes and fixes for P0717 GMC OBDII Code

Submit a New Comment

  • I took my 2016 GMC Acadia for a full diagnostic because the vehicle didn't want to drive. When I checked the code with my OBD reader, it gave me an error code of P0717. After further diagnostic, they found internal transmission failure in the 3-5-Reverse clutch drum that "needed replacement or overhaul". I had to replace my transmission w/ GM serta unit, fill w/ atf and program transmission for over $8900.

    Reply to Comment

  • Expensive repair. Thank you for sharing!

    Reply to Comment
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