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Code
P0508
Idle

Idle air control circuit low input

The idle air control circuit reads too low.

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Most likely causes

  1. Faulty IAC valve
  2. Wiring short
  3. Clogged passage

Symptoms you may notice

  • Low idle
  • Stalling

Checks to run

  1. Clean the IAC
  2. Test the valve
  3. Check wiring

Tools you may need

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

Related codes in Idle

P0507

Idle speed higher than expected

 P0506

Idle speed lower than expected

 P0509

Idle air control circuit high input
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