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Code
P0509
Idle

Circuit régulateur de ralenti — signal haut

Le circuit du régulateur de ralenti lit trop haut.

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Most likely causes

  1. Vanne IAC défectueuse
  2. Circuit ouvert

Symptoms you may notice

  • High idle

Checks to run

  1. Test the valve
  2. Check wiring

Tools you may need

Multimeter
Always diagnose before replacing. Codes share symptoms; confirm the cause with measurements before buying parts.

Related codes in Idle

P0507

Ralenti plus haut que prévu

 P0506

Ralenti plus bas que prévu

 P0508

Circuit régulateur de ralenti — signal bas
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