P0507 Code – Idle RPM Too High

The P0507 code is an OBD2 diagnostic trouble code that indicates the engine idle speed is higher than expected.

Modern vehicles control idle speed electronically using the engine control unit (ECU) together with components such as the throttle body, idle air control valve and intake sensors.

When the ECU detects that the engine idle speed is above the programmed limit, it stores the P0507 code and turns on the Check Engine Light.

This problem usually indicates excess air entering the engine or an issue with idle speed control.

What the P0507 Code Means

The P0507 diagnostic trouble code means the ECU has detected that the engine idle speed exceeds the target RPM range.

Each vehicle has a programmed idle speed, typically around:

• 600 – 900 RPM for gasoline engines

• 700 – 850 RPM for most modern engines

If the idle speed remains significantly above this range for a certain period, the ECU triggers the P0507 code.

Where the Problem Occurs

Several components are involved in idle speed control.

Electronic throttle body

Controls the amount of air entering the engine.

Idle air control valve (IAC)

Regulates airflow during idle conditions.

Mass airflow sensor (MAF)

Measures the amount of air entering the engine.

Vacuum system

Vacuum leaks can introduce unmetered air.

If any of these systems malfunction, the engine may idle too high.

Common Causes of the P0507 Code

Several issues can trigger this diagnostic trouble code.

Vacuum leaks

Cracked hoses or intake leaks can allow extra air into the engine.

Dirty throttle body

Carbon buildup may prevent proper throttle closing.

Faulty idle air control valve

A malfunctioning IAC valve may allow excessive airflow.

Faulty MAF sensor

Incorrect air readings may cause the ECU to increase idle speed.

Sticking throttle plate

Electronic throttle bodies may stick due to carbon deposits.

ECU idle relearn required

After battery replacement or throttle cleaning, the ECU may require an idle relearn procedure.

Symptoms of a P0507 Code

Drivers may notice several symptoms.

Common symptoms include:

• Check Engine Light illuminated

• High idle speed

• Engine RPM staying high when stopped

• Rough idle

• Increased fuel consumption

• Engine revving when shifting to neutral or park

In some cases, the engine may fluctuate between normal and high idle.

How to Diagnose the P0507 Code

Diagnosing this issue requires inspection of the intake and idle control systems.

Step 1 – Scan the vehicle

Confirm the P0507 code using an OBD2 scanner.

Step 2 – Inspect vacuum hoses

Check for cracked or disconnected vacuum lines.

Step 3 – Inspect throttle body

Look for carbon buildup or sticking throttle plates.

Step 4 – Check MAF sensor data

Use a diagnostic scanner to verify airflow readings.

Step 5 – Perform idle relearn procedure

Some vehicles require ECU recalibration after throttle cleaning.

How to Fix the P0507 Code

Repair solutions depend on the cause identified during diagnosis.

Common repairs include:

• cleaning the throttle body

• repairing vacuum leaks

• replacing the idle air control valve

• replacing the MAF sensor

• performing ECU idle relearn

In many cases, cleaning the throttle body fixes the issue.

Can You Drive With a P0507 Code

Driving with the P0507 code is usually possible, but it is not recommended to ignore the problem.

A high idle condition can lead to:

• increased fuel consumption

• poor drivability

• higher engine wear over time

Repairing the issue quickly helps maintain normal engine operation.

Repair Cost Estimate

Typical repair costs include:

• Throttle body cleaning: 50 – 120 EUR

• Idle air control valve replacement: 100 – 300 EUR

• Vacuum leak repair: 50 – 200 EUR

• MAF sensor replacement: 120 – 350 EUR

Costs vary depending on vehicle model.

Mini FAQ – P0507 Code

Is the P0507 code serious?

Usually not critical, but it indicates an idle control problem that should be fixed to avoid drivability issues.

Can a dirty throttle body cause P0507?

Yes. Carbon buildup inside the throttle body is one of the most common causes.

What RPM is considered high idle?

Most engines idle between 600 and 900 RPM. Idle speeds significantly above this range may trigger the P0507 code.

Can vacuum leaks cause the P0507 code?

Yes. Vacuum leaks allow extra air into the engine, which can raise idle speed.