P0718 moderate

Input/Turbine Speed Sensor Circuit Intermittent

The P0718 code means the vehicle's onboard diagnostic system has detected: Input/Turbine Speed Sensor Circuit Intermittent. This is a moderate severity code.

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Keep driving?
Short distances only
DIY difficulty
hard
Estimated cost
$100 - $400 (parts and labor)
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Common Symptoms

  • Check Engine Light illuminated intermittently
  • Occasional harsh shifting
  • Sporadic speedometer drop-outs
  • Intermittent limp mode engagement

Probable Causes (Ranked by Likelihood)

  • Loose input speed sensor connector Very High
  • Intermittent break in speed sensor wiring High
  • Failing speed sensor with erratic signal Moderate
  • Debris on sensor tip affecting readings Low

Step-by-Step Diagnostic Procedure

  1. Monitor input speed sensor on a scan tool during a test drive for signal dropouts

  2. Wiggle the sensor connector and wiring while monitoring readings

  3. Inspect sensor tip for metallic debris accumulation

  4. Check wiring at stress points for broken strands inside insulation

  5. Replace the input speed sensor if intermittent readings persist

Frequently Asked Questions

Can I drive with code P0718?

Drive short distances only. Input/Turbine Speed Sensor Circuit Intermittent can cause unsafe or unpredictable transmission behavior.

What causes P0718?

The most common cause is a faulty sensor or wiring issue. Loose input speed sensor connector is the most likely cause.

Is P0718 expensive to fix?

Typical repair costs range from $100 - $400 (parts and labor). Sensor replacement is the most common fix.

Sources

This page is built from documented references. Verify against your own service info before repair work.

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