P0507 on Honda
Idle Air Control System RPM Higher Than Expected
P0507 on Honda vehicles indicates idle air control system rpm higher than expected. Au7o has documented this code across 1 Honda model — most commonly on Civic. This code means the engine is idling faster than the computer's target idle speed, typically by a set margin such as 200 RPM above commanded. The engine control module manages idle by metering a small amount of air around the throttle plate (via an idle air control valve or electronic throttle), and when it can't bring the RPM down to target it flags this code. The most common real cause is unmetered air sneaking into the intake — a vacuum leak — that the computer can't compensate for. It generally indicates extra air entering the engine or a problem with the idle/throttle control system. Typical repair costs on Honda range from $50 to $300, depending on the specific model and root cause.
Common Causes of P0507
- •Vacuum or intake air leak (hoses, gaskets, intake boot)
- •Dirty or sticking throttle body or throttle plate
- •Faulty or stuck idle air control valve
- •Leaking intake manifold or throttle body gasket
- •Stuck-open PCV valve or cracked PCV hose
- •Dirty mass airflow sensor giving false readings
- •Failing throttle position sensor
- •Leaking brake booster or its vacuum hose
P0507 on Honda by Model
Honda Civic(1 issue)
- Idle Air Control Valve Carbon Fouling — Hunting/High Idle and Stalling1996-2005
The idle air control valve (IACV) on the throttle body meters the air that bypasses the closed throttle at idle. On D-series Civics it fouls with carbon and the pintle sticks, so the ECU can no longer stabilize idle. Symptoms are a hunting/surging idle, abnormally high idle, or the engine dying when coming to a stop or cold. It is a common, inexpensive fix that owners search because the car stalls at intersections and feels erratic.
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View P0507 across all makes →Frequently Asked Questions
What does P0507 mean on Honda?▼
P0507 stands for "Idle Air Control System RPM Higher Than Expected." This code means the engine is idling faster than the computer's target idle speed, typically by a set margin such as 200 RPM above commanded. The engine control module manages idle by metering a small amount of air around the throttle plate (via an idle air control valve or electronic throttle), and when it can't bring the RPM down to target it flags this code. The most common real cause is unmetered air sneaking into the intake — a vacuum leak — that the computer can't compensate for. It generally indicates extra air entering the engine or a problem with the idle/throttle control system. On Honda specifically, this code is documented across 1 model.
What causes P0507 on Honda vehicles?▼
Common causes on Honda: Vacuum or intake air leak (hoses, gaskets, intake boot), Dirty or sticking throttle body or throttle plate, Faulty or stuck idle air control valve, Leaking intake manifold or throttle body gasket, Stuck-open PCV valve or cracked PCV hose. Specific causes vary by model and year — see the per-model sections below.
How much does it cost to fix P0507 on a Honda?▼
Repair costs on Honda range from $50 to $300, depending on the specific model and root cause.
Which Honda models have P0507 documented?▼
Au7o has documented P0507 on 1 Honda model: Civic.