P0717 - Input/Turbine Speed Sensor A Circuit No Signal
The P0717 code indicates that the Powertrain Control Module (PCM) has detected no signal from the input/turbine speed sensor (also known as the transmission speed sensor) on circuit A. This sensor monitors the rotational speed of the turbine shaft inside the torque converter. Without this signal, the PCM cannot properly control transmission shift timing, line pressure, or torque converter lockup. Common causes include a faulty sensor, damaged wiring or connectors, low transmission fluid, or internal transmission mechanical failure.
01. Most Common Causes
- Faulty input/turbine speed sensor
- Damaged or corroded wiring/connectors to the sensor
- Low or contaminated transmission fluid
- Internal transmission mechanical failure (e.g., damaged turbine shaft or torque converter)
02. Symptoms You Will Notice
- Check Engine Light illuminated
- Erratic or harsh shifting
- Transmission slipping or delayed engagement
- Reduced fuel economy
- Transmission may go into limp mode
03. Step-by-Step Diagnosis
Step 1: Use an OBD2 scanner to confirm the code and check for additional transmission-related codes.
Step 2: Inspect transmission fluid level and condition; top off or replace if necessary.
Step 3: Visually inspect the sensor wiring and connector for damage, corrosion, or loose connections.
Step 4: Test the sensor resistance and voltage output with a multimeter; compare to manufacturer specifications.
Step 5: If sensor and wiring are okay, perform a transmission mechanical inspection (e.g., check turbine shaft for damage).
04. Commonly Affected Makes
05. Frequently Asked Questions
Is it safe to drive with this code?▼
It is not recommended to drive with P0717 as it can cause erratic shifting, transmission damage, or complete failure. Have it diagnosed and repaired promptly.
How much does it cost to fix?▼
The cost typically ranges from $50 to $150 for a sensor replacement, but can be higher if wiring repairs or transmission work is needed.