OBD Guide
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P1508

Idle Air Control Valve Circuit Malfunction

P1508 is an OBD-II diagnostic trouble code meaning: Idle Air Control Valve Circuit Malfunction. Common causes: idle air valve malfunction, open or short circuit in control circuit. Estimated repair cost: $17–56.

Severity
⚠️ Medium
Can you drive?
Yes, but get it checked soon
Approx. repair cost
$17–56 (est.)

Symptoms

  • Unstable idle speed
  • Engine stalls at idle
  • Floating speed when warming up
  • Increased vibration at idle
  • Check Engine light comes on

Causes

  • Idle air valve malfunction
  • Open or short circuit in control circuit
  • Valve dirty or stuck
  • Valve connector problems
  • Engine ECU malfunction

How to Fix

  1. Check the condition of the idle air valve
  2. Check the integrity of the control circuit and connectors
  3. Clean the valve from dirt
  4. Replace valve if necessary
  5. Check the operation of the system after repair

Related codes

P0505P0506P0507

Error P1508 by Vehicle Brand

AcuraBMWBuickCadillacChevroletChryslerGMGMCHondaInfinitiJaguarKiaMazdaOldsmobileSaturnVolkswagen

FAQ

What does the P1508 code mean?

P1508 is an OBD-II diagnostic trouble code that indicates: Idle Air Control Valve Circuit Malfunction

What causes a P1508 error code?

The most common causes of P1508 include: Idle air valve malfunction; Open or short circuit in control circuit; Valve dirty or stuck; Valve connector problems.

How do I fix a P1508 diagnostic trouble code?

To fix P1508: Check the condition of the idle air valve. Check the integrity of the control circuit and connectors. Clean the valve from dirt. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with P1508?

Yes, but get it checked soon

How much does it cost to fix P1508?

The estimated repair cost for P1508 is $17–56. Actual cost depends on your vehicle, location, and labor rates.

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