P0507 on Toyota
Idle Air Control System RPM Higher Than Expected
P0507 on Toyota vehicles indicates idle air control system rpm higher than expected. Au7o has documented this code across 1 Toyota model — most commonly on 4Runner. 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 Toyota range from $20 to $350, 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 Toyota by Model
Toyota 4Runner(1 issue)
- 3.4L 5VZ-FE Idle Air Control (IAC) Valve Carbon Fouling — Rough/Surging Idle, Stalling (P0505)1996-2002
The 3.4L 5VZ-FE uses a rotary-solenoid Idle Air Control (IAC) valve on the throttle body to manage idle. Over high mileage the IAC passages and valve clog with carbon and oil deposits, producing erratic idle (hunting between ~700 and ~1200 RPM), high idle, or low idle that shakes and stalls — often stalling at stops or when the A/C compressor loads the engine. It's a very frequent, well-documented maintenance item for 5VZ-FE 4Runners/Tacomas and commonly sets P0505 (idle control system malfunction).
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View P0507 across all makes →Frequently Asked Questions
What does P0507 mean on Toyota?▼
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 Toyota specifically, this code is documented across 1 model.
What causes P0507 on Toyota vehicles?▼
Common causes on Toyota: 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 Toyota?▼
Repair costs on Toyota range from $20 to $350, depending on the specific model and root cause.
Which Toyota models have P0507 documented?▼
Au7o has documented P0507 on 1 Toyota model: 4Runner.