AutoCodes – Ford – P1507 2008 Ford Fusion

P1507 2008 Ford Fusion Code - Idle Air Control Under Speed Error

Quick Answer

The Idle Air Control Valve (IACV) valve assembly controls the engine idle speed and provides a dashpot function. Common causes include Faulty Idle Air Control (IAC) valve, IAC valve stuck closed, IAC valve harness is open or shorted. 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: P1507 2008 Ford Fusion indicates Idle Air Control Under Speed Error.
Common causes: Common causes include Faulty Idle Air Control (IAC) valve, IAC valve stuck closed, IAC valve harness is open or shorted.
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.

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Code Popularity 5,331

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Intermediate (2 / 3)

What is this?

Table of contents Created and updated by William Orellana on Aug 25, 2019

Description
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code P1507 2008 Ford Fusion Description

The Idle Air Control Valve (IACV) valve assembly controls the engine idle speed and provides a dashpot function. The IAC valve assembly meters intake air around the throttle plate through a bypass within the IAC valve assembly and throttle body. The Powertrain Control Module (PCM) determines the desired idle speed or bypass air and signals the IAC valve assembly through a specified duty cycle. The IAC valve responds by positioning the IAC valve to control the amount of bypassed air. The PCM monitors engine RPM and increases or decreases the IAC duty cycle in order to achieve the desired RPM.

OBDII Code P1507 2008 Ford Fusion - Idle Air Control Under Speed Error - AutoCodes.com — P1507 2008 Ford Fusion Code - Idle Air Control Under Speed Error

What does this mean?

What are the Possible Causes of the DTC P1507 2008 Ford Fusion?

Faulty Idle Air Control (IAC) valve
IAC valve stuck closed
IAC valve harness is open or shorted
IAC valve circuit poor electrical connection

How to Fix the DTC P1507 2008 Ford Fusion?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What does this mean?

Code Tech Notes

The P1507 code means that the engine idle is out of factory specification. Sometimes the Idle Air Control (IAC) may have carbon built up. Disconnect the car battery, remove the valve, clean, re-install valve, and drive the vehicle for about 5 minutes with the headlights and A/C ON to get the idle relearned.
If the problem persistss, the IAC valve may need to be replaced.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P1507 2008 Ford Fusion code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

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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 P1507 2008 Ford Fusion Code

1. What are the common symptoms of OBDII code P1507 in a 2008 Ford Fusion?

Symptoms may include rough idle, stalling at idle, fluctuating idle speed, and potential engine hesitation.

2. What does the OBDII code P1507 in a 2008 Ford Fusion indicate?

The code refers to an Idle Air Control Under Speed Error, signaling an issue with the idle air control system.

3. What are the possible causes of OBDII code P1507 in a 2008 Ford Fusion?

Common causes may include a faulty idle air control valve, vacuum leaks, throttle body issues, or a dirty air filter.

4. How can I diagnose the cause of OBDII code P1507 in my 2008 Ford Fusion?

Diagnosis typically involves inspecting and testing the idle air control valve, checking for vacuum leaks, cleaning the throttle body, and ensuring proper air filter maintenance.

5. Can a dirty throttle body cause OBDII code P1507 in a 2008 Ford Fusion?

Yes, a dirty throttle body can disrupt the proper airflow and cause the idle air control system to malfunction, triggering code P1507.

6. How can I repair OBDII code P1507 in my 2008 Ford Fusion?

Possible repairs include cleaning or replacing the idle air control valve, fixing vacuum leaks, cleaning the throttle body, and replacing the air filter if necessary.

7. Is it safe to continue driving with OBDII code P1507 in a 2008 Ford Fusion?

It is not recommended to drive with this code unresolved, as it can lead to poor engine performance, stalling, and potential safety issues.

8. Can a DIY enthusiast fix OBDII code P1507 in a 2008 Ford Fusion?

Depending on the cause, some repairs like cleaning the throttle body or replacing the air filter can be done by a DIY enthusiast with the right tools and knowledge.

9. How much does it typically cost to repair OBDII code P1507 in a 2008 Ford Fusion?

Costs can vary based on the specific cause of the issue and whether professional assistance is needed, but repairs for this code can range from relatively inexpensive to moderately costly.

10. Will resetting the OBDII code P1507 in a 2008 Ford Fusion make it go away permanently?

Simply resetting the code without addressing the underlying issue will not make it disappear permanently; the root cause must be diagnosed and repaired to prevent the code from reoccurring.