P0718Transmission

Input/Turbine Speed Sensor Intermittent

P0718 means the PCM or TCM detected an intermittent or noisy signal from the input or turbine speed sensor. The signal drops out or spikes, usually from wiring, a connector, or a failing sensor.

🚗 Limited. An intermittent input speed signal causes erratic shifting and possible limp mode.
HIGH
severity
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🎯 Top Causes, Ranked by Likelihood

#1Loose or corroded connector$20-$100
35%
Intermittent contact drops the signal briefly.
#2Damaged or chafed wiring$100-$300
30%
A broken wire strand interrupts the signal.
#3Faulty input/turbine speed sensor$100-$350
25%
An internally failing sensor drops out intermittently.
#4Contaminated fluid or debris$100-$300
10%
Debris disrupts the sensor reading at times.

🩺 Common Symptoms

💰 Repair Cost: DIY vs Shop

DIY Cost
$20-$350
Shop Cost
$100-$450

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🔧 How to Diagnose P0718

1Wiggle-test the sensor connector and wiring while monitoring the signal
2Inspect for corrosion or chafed wires
3Check transmission fluid level and condition
4Replace the input speed sensor if the signal drops out

❓ Frequently Asked Questions

Can I drive with P0718?
Only briefly. An intermittent signal causes erratic shifting and limp mode. Diagnose it soon.
What does intermittent mean here?
The input speed signal drops out or spikes occasionally rather than failing constantly, usually a wiring or connector issue.
How much to fix P0718?
A connector or wiring repair is $20-$300, and a replacement sensor runs $100-$350.

🔗 Related Codes

P0715P0717P0722P0721P0720
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