P0717 means Input/Turbine Speed Sensor A Circuit No Signal. The computer is not seeing any signal from the input (turbine) speed sensor while the vehicle is moving. It is a generic OBD-II code, so the definition is the same on any make, but the most likely cause varies by engine; confirm with a scan tool and the service information for your vehicle before buying parts.
What P0717 means
Electronically controlled automatics are run by a transmission control module (TCM), a separate box or part of the engine computer. It reads speed sensors, the range sensor and fluid temperature to decide when to shift, and drives solenoids that apply clutches and the torque converter clutch. Many basic code readers only show the generic P0700; a scan tool that reads the transmission module shows the specific fault. Check fluid level and condition first, since low or burnt fluid causes many transmission codes.
P0717 symptoms
- Harsh shifts or no upshifts
- Limp mode
- Torque converter clutch not engaging
Common causes of P0717
- Failed input speed sensor
- Open wiring or a corroded connector
- Metal debris on the sensor
How to diagnose P0717
- Inspect the sensor connector and wiring
- Check sensor resistance and output
- Check the fluid and the sensor tip for metal debris
Can you drive with P0717?
Often drivable to a shop, but shifting may be poor.
P0717 tips
If P0717 appears together with metal debris on the magnetic sensor tip, cleaning the sensor fixes the symptom but not the cause; metal in the fluid means internal wear that needs inspection.
Will P0717 clear itself?
If the fault stops, the computer turns off the check engine light by itself after several drive cycles without seeing it again, and the code stays in memory as history for a while. Clearing P0717 with a scan tool after a repair is fine, but if the cause is still there the code returns, sometimes within one drive. Disconnecting the battery also clears codes on most vehicles, but it erases learned fuel trims and idle settings as well.
Related codes
| Code | Meaning |
|---|---|
| P0715 | Input/Turbine Speed Sensor A Circuit |
| P0722 | Output Speed Sensor Circuit No Signal |
| P0700 | Transmission Control System Malfunction |
Guides that help
When it is more than a sensor
If the fault turns out to be internal (worn clutches, a failed converter or a damaged valve body), compare a rebuild with a replacement in transmission rebuild vs replacement and transmission replacement cost, identify your unit with what transmission do I have?, and browse our transmissions.
More guides: bad transmission speed sensor symptoms.
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