How much does it cost to fix P0505?

Typical repair cost is $100–$400.

P0505 — Idle Air Control System Malfunction

Medium Severity · Engine

OBD-II code P0505 means your vehicle's ECU detected: Idle Air Control System Malfunction. Below: causes, step-by-step fixes, and repair cost — free, no signup needed.

Drivable short-term but schedule a diagnosis soon. Prolonged driving can worsen the issue.

Typical Repair Cost

$100–$400

Parts + labor, national average

Severity

Medium

Schedule repair soon

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Common Causes of P0505

Dirty/failed IAC valve
Vacuum leak
Dirty throttle body

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How to Fix Code P0505

Clean throttle body ($10–$30)

Clean/replace IAC valve

Check for vacuum leaks

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FAQ — Code P0505

What does OBD-II code P0505 mean?

P0505 means your vehicle's onboard computer detected: Idle Air Control System Malfunction. This is a medium-severity code in the Engine category.

How much does it cost to fix code P0505?

Typical repair cost for P0505 is $100–$400 including parts and labor. Costs vary by vehicle make, model, and location. A free scan at AutoZone or O'Reilly is a good first step.

Can I drive my car with code P0505?

Code P0505 is generally safe for short trips, but have it diagnosed soon to prevent the problem from worsening.

What are the most common causes of P0505?

The most common causes are: Dirty/failed IAC valve, Vacuum leak, Dirty throttle body. Always start with the cheapest diagnosis step before replacing parts.

Will code P0505 clear itself?

Code P0505 will clear itself after the underlying issue is fixed and the ECU completes several successful drive cycles. Clearing it without fixing the root cause only masks the problem temporarily.

Is P0505 showing on your car?

Enter your VIN for a free vehicle-specific report — recalls, specs, and market value. No signup required.

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OBD-II code data is based on SAE J2012 standards and general repair industry data. Repair costs are national averages and vary by vehicle, location, and shop. Always consult a qualified mechanic for a diagnosis specific to your vehicle.