P0508
Idle Air Control System Circuit Low
P0508 is an OBD-II diagnostic trouble code meaning: Idle Air Control System Circuit Low. Common causes: idle air control (iac) malfunction, open or short circuit in control circuit. Estimated repair cost: $56–167.
Symptoms
- Unstable idle
- Engine stalling at idle
- Floating speed
- Difficulty starting
Causes
- Idle air control (IAC) malfunction
- Open or short circuit in control circuit
- Oxidation of contacts in connectors
- Wiring Harness Problems
- ECU malfunction (rare)
How to Fix
- Check the integrity of the idle air control circuit
- Inspect connectors and contacts for oxidation
- Test the idle air control
- If necessary, replace the IAC or repair the wiring harness.
- Reset the error and check engine operation
Related codes
Error P0508 by Vehicle Brand
FAQ
What does the P0508 code mean?
P0508 is an OBD-II diagnostic trouble code that indicates: Idle Air Control System Circuit Low
What causes a P0508 error code?
The most common causes of P0508 include: Idle air control (IAC) malfunction; Open or short circuit in control circuit; Oxidation of contacts in connectors; Wiring Harness Problems.
How do I fix a P0508 diagnostic trouble code?
To fix P0508: Check the integrity of the idle air control circuit. Inspect connectors and contacts for oxidation. Test the idle air control. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with P0508?
Limited driving only, diagnose soon
How much does it cost to fix P0508?
The estimated repair cost for P0508 is $56–167. Actual cost depends on your vehicle, location, and labor rates.
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