P0717: Input/Turbine Speed Sensor Circuit No Signal
Can you still drive? The vehicle will likely be stuck in limp mode with only one gear available. You can drive slowly to a shop, but avoid highway driving and extended trips.
What Does P0717 Mean?
Code P0717 indicates that the PCM/TCM is receiving no signal at all from the input/turbine speed sensor, whereas P0715 indicates an erratic signal. This complete loss of input speed data means the transmission computer cannot calculate gear ratios or shift timing. The transmission will typically default to limp mode to protect itself from damage.
Need to read your codes?
An OBD-II scanner lets you read and clear diagnostic trouble codes from your vehicle's computer. Most scanners work with any car made after 1996.
Browse OBD-II Scanners on AmazonCommon Causes
- Failed input speed sensor
- Broken wiring to sensor
- Corroded sensor connector
- Blown fuse in transmission circuit
- Damaged tone ring inside transmission
Symptoms
- Check engine light on
- Transmission in limp/failsafe mode
- Stuck in one gear (usually 2nd or 3rd)
- No upshifts or downshifts
- Harsh engagement when selecting Drive or Reverse
Diagnostic Steps
- 1Verify the code with a scan tool and check for related codes
- 2Check transmission fuse and relay
- 3Inspect input speed sensor connector and wiring for damage
- 4Measure sensor resistance and compare to specifications
- 5Test for signal output while rotating the input shaft
- 6Inspect tone ring for damage if sensor tests good
Recommended Parts & Tools
input speed sensor
electrical connector kit
transmission fluid
Estimated Repair Cost
| Type | Estimated Cost |
|---|---|
| Total Repair Cost Range | $80 - $450 |
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Chat with AI About P0717Commonly Affected Vehicles
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Frequently Asked Questions
What is the difference between P0715 and P0717?
P0715 means the input speed sensor signal is erratic or irrational, while P0717 means there is no signal at all. P0717 usually points to a completely failed sensor or broken wire.
Why is my transmission stuck in one gear?
When the TCM loses the input speed sensor signal, it enters limp mode as a safety measure. This locks the transmission in one gear to prevent damage until the fault is repaired.
Community Fix Reports
Community reports are user-submitted and not verified by Auto AI Buddy. Results may vary.
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