P0518

2017-10-10

Description:

  • The fault code P0518 indicates that there is a low voltage problem in the idle air control (IAC) system circuit. This may cause the engine to stall or have a rough idle.

Possible Symptoms:

  • Engine stalls or has a rough idle

  • Illuminated check engine light

  • Unstable idle speed

  • Reduced engine power or acceleration

Possible Causes:

  • Faulty idle air control valve

  • Damaged or corroded wiring in the IAC circuit

  • Loose or corroded electrical connections in the IAC circuit

  • Failed engine control module (ECM)

Related Parts:

  • Idle Air Control System: IAC (Idle Air Control) System controls the speed of the engine when it is idling. This car's engine may keep stalling due to problems with the IAC

Possible Solutions:

  • Replace the idle air control valve

  • Check and repair any damaged or corroded wiring in the IAC circuit

  • Tighten or clean any loose or corroded electrical connections in the IAC circuit

  • Replace the engine control module (ECM) if necessary

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