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P0511 – Idle Air Control Circuit

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Symptoms

  • Rough idle
  • Stalling
  • High idle

Causes

  • Faulty IAC valve
  • Wiring issues
  • Vacuum leaks

Diagnosis

  • Monitor IAC data
  • Inspect wiring
  • Check vacuum

Repair

  • Replace IAC valve
  • Repair wiring
  • Fix leaks
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