P0507 – Idle Control System RPM Higher Than Expected

Description

The ECM detects idle speed higher than the programmed target.

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Symptoms

  • High idle
  • Rough idle
  • Hesitation
  • Poor fuel economy

Causes

  • Vacuum leaks
  • Dirty throttle body
  • Faulty IAC valve
  • PCV issues

Diagnosis

  • Inspect vacuum lines
  • Clean throttle body
  • Monitor idle control data

Repair

  • Fix vacuum leaks
  • Clean throttle body
  • Replace IAC valve
  • Repair PCV system