P0717
Input/Turbine Shaft Speed Sensor A Circuit No Signal
Transmission / speed sensor
Generic OBD-II
High
What it means
P0717 means the transmission control module gets no signal from the input (turbine) shaft speed sensor. The transmission relies on this sensor to time its shifts, so losing the signal typically causes harsh or erratic shifting and can drop the transmission into limp mode. The engine still starts and runs normally, but the fault should be repaired before it strains the transmission.
High
Can I keep driving? The engine starts and runs, but the transmission may shift harshly or drop into limp mode — drive gently and get it repaired soon.
Common symptoms
What you'll notice
- Check-engine light on
- Harsh, erratic, or delayed shifting
- Transmission stuck in one gear or in limp mode
- No or erratic torque-converter lockup
Common causes
Most likely first
- Faulty input/turbine speed sensorLikely
- Open or damaged wiring or connector at the sensorCommon
- Damaged or contaminated reluctor/tone ring the sensor readsCommon
- TCM fault (less common)Less often
How to diagnose & fix
Work through it in order
- Read freeze-frame data and check for other transmission speed-sensor codes.
- Inspect the sensor, its wiring, and connector for damage, opens, or corrosion.
- Check the sensor's air gap and the reluctor ring for damage or debris.
- Test the sensor signal and replace the sensor if it fails, then clear and re-test.
FAQ
Quick answers
Is it safe to drive with P0717?+
The car still runs, but harsh shifting or limp mode can strain the transmission, so drive gently and repair it soon.
Can I just clear P0717?+
It will return until the input speed sensor or its wiring is repaired.
Related codes
Often seen with P0717
Read & clear P0717 yourself
Scan your car, confirm the code, and clear it once it's fixed — with OBD DashX on your phone.
✓ Verified name — SAE J2012 / ISO 15031-6Guidance reviewed by OBD DashX