P0507 Honda Code (Meaning, Causes & Fixing) of 2024

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When your Honda’s onboard diagnostic system detects a problem with the idle control system, it may trigger a diagnostic trouble code (DTC) known as P0507 Honda Code.

This code is specifically related to idle air control issues in Honda vehicles and can indicate various underlying problems affecting engine performance.

p0507 honda

Understanding the Meaning of P0507 Honda Code

P0507 is a generic OBD-II code that indicates a high idle condition. In Honda vehicles, it typically means that the engine’s idle speed is higher than it should be, possibly leading to poor fuel economy, rough idling, and even stalling.

Common Causes of Honda P0507 Code

Here are the Common Causes of P0507 Code Honda:

Faulty Idle Air Control Valve (IACV)

The idle air control valve regulates the amount of air entering the engine at idle. A malfunctioning IACV can cause erratic idling and trigger the P0507 code.

Dirty Throttle Body

A dirty or clogged throttle body can disrupt the airflow, affecting the engine’s idle speed and triggering the P0507 code.

Vacuum Leaks

Leaks in the vacuum system can lead to unmetered air entering the engine, causing the idle speed to rise and triggering the P0507 code.

Faulty Mass Airflow Sensor (MAF)

The MAF sensor measures the amount of air entering the engine. A faulty MAF sensor can provide incorrect data to the engine control unit, resulting in a high idle condition and triggering the P0507 code.

Engine Mechanical Problems

Issues such as a sticking throttle, worn piston rings, or a faulty PCV valve can also cause the engine to idle at a higher speed, triggering the P0507 code.

Symptoms of P0507 Code Honda

  • High idle speed
  • Rough or erratic idling
  • Stalling at idle
  • Poor fuel economy

Diagnosing P0507 Code Honda

To diagnose the P0507 code, you can follow these steps:

Using an OBD-II Scanner

Connect an OBD-II scanner to the vehicle’s diagnostic port and retrieve the fault codes. If P0507 is present, proceed with further diagnosis.

Visual Inspection

Inspect the engine bay for any obvious signs of damage or leaks, such as cracked hoses or disconnected vacuum lines.

Testing IACV Functionality

Use a multimeter to test the resistance of the idle air control valve and ensure it’s within the manufacturer’s specifications. You can also manually actuate the valve to see if it responds correctly.

Inspecting Throttle Body

Remove the throttle body and inspect it for any dirt or carbon buildup. Clean the throttle body thoroughly using a suitable cleaner.

Fixing P0507 Code Honda

Once you’ve identified the underlying cause of the P0507 code, you can proceed with the appropriate repairs:

Cleaning or Replacing Idle Air Control Valve (IACV)

If the IACV is faulty, you can try cleaning it first. If cleaning doesn’t resolve the issue, replacing the IACV may be necessary.

Throttle Body Cleaning

Clean the throttle body using a throttle body cleaner to remove any dirt or carbon deposits that may be affecting airflow.

Fixing Vacuum Leaks

Inspect and repair any vacuum leaks in the system by replacing damaged hoses or tightening connections.

Replacing Faulty MAF Sensor

If the MAF sensor is faulty, replace it with a new one to ensure accurate airflow measurement.

Addressing Engine Mechanical Issues

If other mechanical problems are causing the high idle condition, such as a sticking throttle or worn piston rings, address them accordingly.

Preventive Measures to Avoid P0507 Code of Honda

  • Regular maintenance, including cleaning or replacing the air filter, can help prevent issues with the idle control system.
  • Keep the throttle body and idle air control valve clean to ensure proper airflow.
  • Address any engine performance issues promptly to prevent them from escalating into more significant problems.

People also ask

How do I fix code P0507?

To fix code P0507:

Clean or Replace Idle Air Control Valve (IACV): Clean or replace the IACV if it’s faulty.
Clean Throttle Body: Remove any dirt or carbon buildup from the throttle body.
Address Vacuum Leaks: Inspect and repair any vacuum leaks in the system.
Replace Faulty MAF Sensor: If the MAF sensor is faulty, replace it with a new one.
Check Engine Mechanical Issues: Address any other mechanical problems affecting idle speed.

Can a vacuum leak cause a P0507?

Yes, a vacuum leak can cause a P0507 code. When there’s a vacuum leak in the engine, it can lead to unmetered air entering the system,

disrupting the air-to-fuel ratio and causing the engine to idle at a higher speed, triggering the P0507 code.

How much does it cost to fix a P0507 code?

The cost to fix a P0507 code varies depending on the underlying cause and the specific repairs needed.

Simple fixes like cleaning the throttle body may cost less than replacing a faulty component like the idle air control valve.

Generally, costs can range from around $100 to $500 or more, depending on the extent of the repairs required.

What is system RPM P0507?

System RPM P0507 refers to a diagnostic trouble code (DTC) that indicates a high idle condition in the engine control system.

It means that the engine’s idle speed is higher than expected, possibly due to issues with the idle air control system or other related components.


Dealing with the Honda P0507 code can be frustrating, but understanding its causes and symptoms can help you diagnose and fix the underlying issues.

By following proper diagnostic procedures and performing necessary repairs, you can restore your Honda’s idle control system to proper working condition.

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