This is one of the most frequent OBD2 trouble codes. Read the full article below to know what it means, how to fix it, and what other codes may show related to it.
Definition
P0717 is an OBD-II Code that refers to Input/Turbine Speed Sensor Circuit No Signal
Meaning
A P0717 code is a general diagnostic trouble code that occurs when the PCM/ECM detects and indicates that one of your car’s computers has identified a problem with the speed sensor or its circuit. The transmission input speed is measured by the input speed sensor (also known as the turbine speed sensor).
An automatic transmission is intended to match the vehicle's engine's optimum torque and power levels to the driver's acceleration or deceleration requirements. When the PCM is unable to receive the expected input signal from the input/turbine speed sensor, it is unable to generate appropriate predictions or matches.
Also read: How Much Does It Cost To Replace Transmission Mounts
The P0717 code will be set and stored in the PCM's memory, and a malfunction indicator light (MIL) will usually be illuminated.
Causes
Common causes for this code include:
- A shorted, open, or otherwise damaged circuit
- Bad or problematic valve body
- Bad shift solenoids
- Malfunctioned input or turbine speed sensor
- Dirty transmission fluid
Symptoms
The symptoms of a P0717 code are:
- Illuminated Check Engine Light
- An erratic speedometer
- Erratic or harsh transmission shift points
- Problems when attempting to shift gears
- Decreased fuel efficiency
Diagnosis
To diagnose a P0717 DTC code, a technician would:
- Scan for codes in the ECM and look at the freeze frame data for failure.
- Visually inspect the wiring and connectors for damage or shorts.
- Check the valve body for any damage or leaks.
- Test the input and turbine speed sensors for proper function.
- Check the transmission fluid level and quality.
Common mistakes
The following are some of the most common mistakes that a technician may make when diagnosing a P0717 code:
- Not thoroughly inspecting all the wiring and connectors for damage.
- Not checking the valve body for any damage or leaks.
- Not testing the input and turbine speed sensors for proper function.
- Not checking the transmission fluid level and quality.
How serious is this?
A P0717 code is a relatively serious code and should be diagnosed and repaired as soon as possible.
What repairs can fix the code?
The following are solutions that may fix this problem:
- Repair or replace any wiring that is damaged
- Replace any bad or problematic valve body
- Replace any bad shift solenoids
- Replace the input or turbine speed sensor
- Flush and replace the dirty transmission fluid
Related codes
A P0717 is related to and may be accompanied by the following codes:
P0700 – Transmission Control System (TCS) Malfunction
P0715 – Input/Turbine Speed Sensor Circuit Malfunction
Conclusion
In conclusion, the P0717 code is a diagnostic trouble code that refers to a problem with the input or turbine speed sensor or its circuit. The code will be set and stored by the PCM/ECM when it detects a problem with the input speed sensor or its circuit. The code is relatively serious and should be diagnosed and repaired as soon as possible.