P0518Medium SeverityElectrical

Idle Air Control Circuit Intermittent

What This Means

The idle air control circuit intermittent has been detected. This affects battery monitoring and charging system control or idle regulation.

Common Symptoms

Check engine light on
System malfunction
Erratic operation
Warning light on

Common Causes

Faulty sensor or switch
Wiring damage
Connector corrosion
Module failure
Circuit fault

Estimated Repair Cost

$75 – $500

Parts and labor (varies by vehicle and location)

Difficulty:Moderate

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For informational purposes only. Diagnostic trouble codes are starting points for diagnosis, not definitive answers. Always consult a certified mechanic for proper diagnosis and repair. Estimated costs vary by vehicle, location, and shop rates.