P0718 Code: Input/Turbine Shaft Speed Sensor A Circuit Intermittent
🟠 Moderate severity · drivable
You can drive, but the speed signal can cut out at any time, which may cause sudden harsh shifts.
What P0718 means
The input/turbine shaft speed sensor signal is cutting in and out. Intermittent faults are usually caused by loose or corroded connections, damaged wiring, or a sensor that is starting to fail. The computer loses its speed reading off and on, which can cause sudden, harsh shifts.
Symptoms
- Check engine light is on
- Sudden harsh or delayed shifts
- Transmission occasionally slips
- Transmission may go into fail-safe mode at times
Common causes
- most common: Loose or corroded connector
- common: Faulty input shaft speed sensor
- common: Damaged or chafed wiring
- less common: Contaminated transmission fluid
How to fix it
| Fix | DIY? | Typical cost |
|---|---|---|
| Clean and re-seat the sensor connector | Yes | $10–30 |
| Inspect and repair damaged wiring | Mechanic | $80–250 |
| Replace the input shaft speed sensor | Mechanic | $150–400 |
Frequently asked questions
Can I drive with a P0718 code?
Yes, but the speed signal can cut out without warning, causing sudden harsh shifts. Drive cautiously and get it diagnosed soon.
Why is the P0718 code intermittent?
Intermittent codes usually come from loose or corroded connections or a sensor that is failing slowly. The fault appears and disappears as the connection makes and breaks.
How much does it cost to fix a P0718?
Cleaning a connector is nearly free and often fixes it. If the sensor needs replacing, expect $150–$400 including parts and labor.
Related codes
P0716
P0716 Code: Input/Turbine Shaft Speed Sensor A Circuit Range/Performance
P0721P0721 Code: Output Shaft Speed Sensor Circuit Range/Performance
P0700P0700 Code: Transmission Control System Malfunction
Updated 2026-08. This page is informational and not a substitute for professional diagnosis.