Input/Turbine Speed Sensor Circuit Intermittent
What does P0718 mean?
The P0718 code means the vehicle's onboard diagnostic system has detected: Input/Turbine Speed Sensor Circuit Intermittent. This is a moderate severity code.
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
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Monitor input speed sensor on a scan tool during a test drive for signal dropouts
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Wiggle the sensor connector and wiring while monitoring readings
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Inspect sensor tip for metallic debris accumulation
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Check wiring at stress points for broken strands inside insulation
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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.