P0505

Idle Control System Malfunction

P0505
Idle Control System Malfunction
Address soon
Ranked Possible Causes
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What You'll Notice

Idle surges up and down, Stalling at stops, Idle too high or too low, Rough idle in park/neutral

Cost Estimate
JobRange
Throttle body cleaning (DIY)$15–$30
IAC valve replacement$60–$180
Vacuum leak repair$30–$200
Electronic throttle body replacement$250–$550
Parts You Might Need
• Throttle body cleaner
• IAC valve
• Throttle body assembly

These percentages are general patterns, not a diagnosis for your specific vehicle. Have a technician scan your car to confirm which component is actually failing.

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