What Does P0717 Mean?
The input/turbine speed sensor circuit is reporting values outside the expected range or performance parameters. This is a variant of P0716 and indicates the TCM cannot reliably determine the transmission input shaft speed. Without accurate input speed data, the TCM cannot calculate torque converter slip or determine the correct shift points, leading to transmission drivability issues.
Common Causes
35%
Defective input/turbine speed sensor
25%
Corroded or damaged wiring and connectors in the sensor circuit
20%
Damaged reluctor ring or tone wheel with missing/chipped teeth
10%
Metallic debris on the sensor tip distorting the magnetic signal
10%
TCM internal fault not properly processing the sensor signal
Diagnostic Steps
1
Compare the ISS PID to engine RPM in live data. In each gear at steady speed, the ratio should be predictable. No signal or frozen signal confirms a circuit fault.
2
Check the sensor output voltage with a scope if available. A magnetic pickup should produce a clean sine wave proportional to speed. Irregular waveform patterns indicate reluctor damage.
3
Inspect the sensor and its connector. Remove the sensor and check for metallic debris on the tip. Clean with a lint-free cloth.
4
Measure the sensor resistance and compare to manufacturer spec (typically 300-1,200 ohms). An open or shorted reading requires sensor replacement.
5
Verify wiring continuity and insulation integrity from the sensor connector to the TCM connector. Check for shorts to ground, shorts to power, and open circuits.
Estimated Repair Cost
$100 - $500
Parts + labor, varies by vehicle and location
The input/turbine speed sensor circuit is reporting values outside the expected range or performance parameters. This is a variant of P0716 and indicates the TCM cannot reliably determine the transmission input shaft speed. Without accurate input speed data, the TCM cannot calculate torque converter...
The most common cause of P0717 (Input/Turbine Speed Sensor Circuit Range/Performance) is: Defective input/turbine speed sensor
Typical repair costs for P0717 range from $100 to $500, depending on the vehicle, location, and whether you do it yourself or go to a shop.
The TCM may enter limp/failsafe mode, restricting the vehicle to a single gear. This makes highway driving difficult and potentially unsafe during merging. Have the vehicle repaired before extended driving.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P0717 to identify the root cause.
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Quick Info
Category
Powertrain
System
Transmission
Difficulty
Type
Generic (SAE)
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