P0507 on a Honda: Causes, Fixes & Repair Cost

🟠 Moderate severity · drivable

Drivable, but the engine idles too fast, which wastes fuel and makes low-speed driving feel odd.

What P0507 means on a Honda

On a Honda, P0507 means the engine idles higher than the computer expects. On older Hondas this is usually the idle air control valve letting too much air past, or a vacuum leak. The car still drives, but the high idle wastes fuel.

Is P0507 common on Hondas?

P0507 is a well-known issue on older Honda models like the Civic, Accord, CR-V, and Odyssey. Carbon builds up in the idle air control valve and throttle body, which is why cleaning them is a classic Honda repair. Vacuum leaks from aged hoses are the other common cause.

Commonly reported on: Civic, Accord, CR-V, Odyssey.

Symptoms

Check engine light is on
High idle speed
Idle hangs when you take your foot off the gas
Car creeps forward at stops

Common causes

most common: Dirty or sticking idle air control valve
common: Vacuum leak
common: Carbon buildup in the throttle body
less common: Leaking PCV hose

How to fix it

Fix	DIY?	Typical cost
Clean the idle air control valve and throttle body	Yes	$10–40
Find and repair vacuum leaks	Yes	$10–100
Replace a faulty idle air control valve	Yes	$50–200