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Engine-Codes – Hummer – P0507 Hummer

P0507 Hummer Code - Idle Speed High

Quick Answer

When the diagnostic trouble code P0507 appears on a Hummer, it indicates that the vehicle's idle speed is higher than the specified limit set by the manufacturer. Common causes include Malfunctioning idle air control valve, Vacuum leak in the intake system, Dirty or clogged air filter. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means
P0507 Hummer indicates Idle Speed High.
Common causes
Common causes include Malfunctioning idle air control valve, Vacuum leak in the intake system, Dirty or clogged air filter.
Severity
High - diagnose this code as soon as possible.
Can I drive?
Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
What is this?
Table of contents Created and updated by William Orellana on Sep 11, 2024
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Code P0507 Hummer Description

When the diagnostic trouble code P0507 appears on a Hummer, it indicates that the vehicle's idle speed is higher than the specified limit set by the manufacturer. The idle speed refers to the rotational speed of the engine when the vehicle is stationary and the driver is not pressing the accelerator pedal. A high idle speed can lead to a variety of issues, including decreased fuel efficiency, increased emissions, and potential damage to engine components over time.

OBDII Code P0507 Hummer - Idle Speed High
P0507 Hummer Code - Idle Speed High

Common Causes of P0507 Hummer

  1. Malfunctioning idle air control valve
  2. Vacuum leak in the intake system
  3. Dirty or clogged air filter
  4. Faulty throttle position sensor
  5. Issues with the engine's computer system

Symptoms of P0507 Hummer

  1. High idle speed when the vehicle is stationary
  2. Rough idling or shaking of the vehicle
  3. Increased fuel consumption
  4. Check Engine light illuminated on the dashboard

How to Fix P0507 Hummer

  1. Diagnose the root cause of the high idle speed by using a scan tool to check for any other related trouble codes.
  2. Inspect the idle air control valve for any signs of malfunction and clean or replace it if necessary.
  3. Check for vacuum leaks in the intake system and repair or replace any damaged hoses.
  4. Inspect and replace the air filter if it is dirty or clogged.
  5. Test the throttle position sensor for proper operation and replace it if faulty.

Cost to Fix P0507 Hummer

The cost of repairing a high idle speed issue on a Hummer can vary depending on the specific cause of the problem and the labor rates at the auto repair shop. On average, the repair costs can range from $100 to $500, including parts and labor. It is important to note that diagnostic time and labor rates can vary based on location, vehicle make and model, and engine type. It is advisable to contact local auto repair shops for a more accurate estimate.

What does this mean?

Tech Notes for P0507 Hummer

If there are no intake leaks, clean the throttle body, adjust the engine idle, and erase the engine code. If the code persists you may have to replace the Electric Throttle Control Actuator (Motor).



The Powertrain Control Module (PCM) learns the idle position of the throttle plate to ensure the correct idle. Anytime the throttle body is cleaned or replaced, the PCM must learn the new throttle position. The idle may be unstable or a DTC may be set if the throttle position is not learned.



HUMMER Throttle Body Cleaning and Idle Learning Procedure

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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about P0507 Hummer Code

1. What are the common symptoms of OBDII code P0507 in a Hummer?

- The most common symptom is a high idle speed, typically above the normal range, even when the engine is warm.

2. What are the possible causes of the high idle speed indicated by code P0507 in a Hummer?

- The high idle speed can be caused by a faulty idle air control valve, a vacuum leak, a dirty throttle body, or a malfunctioning throttle position sensor.

3. How can I diagnose the cause of OBDII code P0507 in my Hummer?

- To diagnose the issue, you can start by checking for any vacuum leaks, cleaning the throttle body, inspecting the idle air control valve, and testing the throttle position sensor using a multimeter.

4. Can a high idle speed caused by OBDII code P0507 affect the performance of my Hummer?

- Yes, a high idle speed can lead to poor fuel efficiency, rough idling, and potential stalling issues if left unaddressed.

5. Is it safe to continue driving my Hummer with OBDII code P0507 indicating a high idle speed?

- It is not recommended to drive the vehicle for an extended period with a high idle speed as it can lead to further damage and decreased performance.

6. How can I repair OBDII code P0507 in my Hummer?

- Depending on the underlying cause, the repair may involve replacing the idle air control valve, fixing any vacuum leaks, cleaning the throttle body, or replacing the throttle position sensor.

7. Can a DIY enthusiast fix OBDII code P0507 in a Hummer, or is it better to seek professional help?

- While some simple fixes like cleaning the throttle body can be done by a DIY enthusiast, diagnosing and repairing complex issues may require professional help to ensure proper resolution.

8. Will resetting the OBDII code P0507 in my Hummer make the high idle speed issue disappear?

- Resetting the code may temporarily turn off the check engine light, but the underlying issue causing the high idle speed will persist until properly diagnosed and repaired.

9. How long does it typically take to repair OBDII code P0507 in a Hummer?

- The repair time can vary based on the specific cause of the high idle speed, but it can range from a quick fix like cleaning the throttle body to a more involved repair like replacing a faulty idle air control valve.

10. Are there any preventive measures to avoid encountering OBDII code P0507 and high idle speed in a Hummer?

- Regular maintenance, such as cleaning the throttle body and inspecting for vacuum leaks, can help prevent issues that lead to a high idle speed and OBDII code P0507.

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