P0506 Idle Control System RPM Lower Than Expected

Powertrain Severity: Low Generic OBD-II

Idle speed is below the target.

Common causes

  • Dirty throttle body
  • Restricted air intake

Symptoms

  • Low idle
  • Stalling

What to check

  1. Clean throttle body
  2. Check air filter
  3. Perform idle relearn

Manufacturers may add their own detail to generic codes. If your vehicle shows a different description for P0506, follow the service information for that make and model.

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