What P0717 means
The transmission computer has lost the signal from the sensor that measures how fast the transmission's input shaft is turning. Without it, the computer can't work out which gear it's in or when to shift smoothly, so it usually switches to a backup mode. A failed sensor or a damaged wire or connector is the most common cause.
How the engine computer detects it
The input or turbine shaft speed sensor – a Hall sensor with square-wave output or an inductive sensor with sine output – reports the speed behind the torque converter. With output and engine speed it gives the actual gear ratio, converter slip and shift timing. P0717 means there is practically no input speed signal although the vehicle is driving under power. GM's 2025 modules flag under 200 rpm for more than 4 s with torque applied, the 6T70 under 50 rpm for 5 s, the Allison 1000 under 61 rpm with output above 500 rpm; Ford under 200 rpm for 5–30 s; all after one trip. GM calls it 'circuit low voltage', but means missing frequency. On GM's 10-speed both input and output sensors share a supply – P0717 together with P0722 points to that supply rather than two sensors.
Written from public technical sources and not yet checked by a mechanic. How we write these pages
Symptoms
- Check engine and/or transmission warning lamp
- Limp mode with fixed gear, harsh shifts
- Torque converter clutch does not apply
- Input speed shows 0 or implausible in the scan tool
Common causes
- Speed sensor faulty (Hall IC or coil open or shorted) Most likely
- Connector or harness corroded, chafed or loose pins (with internal sensors also the pass-through connector) Most likely
- Metal debris on the sensor magnet or damaged reluctor wheel Possible
- Transmission module or its sensor supply faulty Less likely
How to diagnose P0717
- Have the transmission module read with a scanner that supports it. If P0722 is also set, a shared sensor supply or connector is more likely than two bad sensors.
- With the ignition off, check the sensor connector and the harness along the transmission for corrosion, chafing or loose pins.
- If the sensor is mounted on the outside of the case, remove it and clean any metal particles off its tip.
- On many transmissions the sensor is inside, behind a pass-through connector. Check that connector for fluid leaks before opening the transmission.
- Replace the sensor if the wiring checks out. If the problem stays, a shop can test the sensor supply from the transmission module.
Vehicles that report P0717 most
| Vehicle | Years | Reports | Share | Median miles |
|---|---|---|---|---|
| Ford F-150 | 2012–2017 | 15 | — | |
| Nissan Pathfinder | 2007 | 5 | 175k | |
| Nissan Frontier | 2007 | 3 | — | |
| Dodge Caliber | 2007–2009 | 3 | 150k | |
| Nissan Xterra | 2007–2008 | 3 | 161k | |
| Chevrolet Silverado 1500 | 2019–2024 | 3 | — | |
| Chevrolet Tahoe | 2021 | 3 | — |
Counts of owner complaints to the NHTSA that mention P0717 (61 in total), not failure rates: popular models get more complaints simply because more of them are on the road. Models with fewer than 3 complaints are left out.
Reading the code
- P
- Powertrain
- 0
- Generic (SAE) code
- 7
- Transmission
- 17
- Specific fault
Questions drivers ask
Can I drive with code P0717?
Drive gently and only to a shop. The transmission may hold one gear and shift harshly, which limits speed and acceleration. If it's stuck in a low gear or won't shift at all, have it towed rather than driving on the highway.
Will my car pass an emissions inspection with P0717?
Probably not in states that test vehicles with an OBD-II scan: an emissions-related code that keeps the check engine light on is usually an automatic fail. Rules differ by state and county, so check yours.
Often reported together
Codes that owners mention in the same NHTSA complaints as P0717. They can point to a shared cause, so it's worth checking them together.
- P0715Input/Turbine Shaft Speed Sensor A Circuit13 complaints
- P0700Transmission Control System (MIL Request)11 complaints
- P0716Input/Turbine Shaft Speed Sensor A Circuit Range/Performance9 complaints
- P2714Pressure Control Solenoid D Performance/Stuck Off7 complaints
- P0776Pressure Control Solenoid B Performance/Stuck Off6 complaints
- P0706Transmission Range Sensor A Circuit Range/Performance5 complaints
This page is general information, not a substitute for a professional diagnosis. Repair costs are rough estimates for parts and labor and vary by vehicle and region.