AutoCodes – Ford – P1506 2006 Ford Fusion

P1506 2006 Ford Fusion Code - Idle Air Control Overspeed 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 harness is open or shorted, IAC valve circuit poor electrical connection. 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: P1506 2006 Ford Fusion indicates Idle Air Control Overspeed Error.
Common causes: Common causes include Faulty Idle Air Control (IAC) valve, IAC valve harness is open or shorted, IAC valve circuit poor electrical connection.
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 2,973

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 P1506 2006 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 P1506 2006 Ford Fusion - Idle Air Control Overspeed Error - AutoCodes.com — P1506 2006 Ford Fusion Code - Idle Air Control Overspeed Error

What does this mean?

What are the Possible Causes of the DTC P1506 2006 Ford Fusion?

Faulty Idle Air Control (IAC) valve
IAC valve harness is open or shorted
IAC valve circuit poor electrical connection
Intake leaks
Stuck PCV Valve

How to Fix the DTC P1506 2006 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 P1506 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.
Also, check for intake leaks or stuck PCV Valve.
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 P1506 2006 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 P1506 2006 Ford Fusion Code

1. What does the OBDII code P1506 mean on a 2006 Ford Fusion?

P1506 indicates an Idle Air Control (IAC) Overspeed Error, meaning the engine's idle speed is higher than the desired range as determined by the PCM (Powertrain Control Module).

2. What are the common symptoms of the P1506 code?

Symptoms include a high idle speed, rough idling, stalling, poor fuel economy, and the check engine light being illuminated.

3. What causes the P1506 code to appear?

Common causes include a dirty or faulty idle air control (IAC) valve, vacuum leaks, a stuck throttle body, or issues with the PCM.

4. How can I diagnose the P1506 code in my 2006 Ford Fusion?

Start by inspecting the IAC valve for dirt or damage, check for vacuum leaks, clean the throttle body, and use a scan tool to monitor idle speed and sensor data.

5. Can a vacuum leak trigger the P1506 code?

Yes, a vacuum leak can cause unregulated air to enter the intake, leading to an elevated idle and triggering the P1506 code.

6. How do I fix the P1506 code on my Ford Fusion?

Clean or replace the idle air control valve, inspect and repair any vacuum leaks, clean the throttle body, or, if needed, reprogram or replace the PCM.

7. Is it safe to drive with the P1506 code?

Driving with this code may not immediately damage the engine, but it can lead to poor performance, increased fuel consumption, and potential stalling, so it should be addressed promptly.

8. How much does it cost to repair the P1506 code?

Repair costs vary but typically range from $100 to $400, depending on whether the IAC valve needs cleaning or replacement and if any additional repairs are required.

9. Can cleaning the throttle body resolve the P1506 code?

Yes, if carbon buildup on the throttle body is causing the high idle, cleaning it may resolve the issue and clear the code.

10. Does a faulty PCM commonly cause the P1506 code?

While rare, a faulty PCM can cause the P1506 code, but it should only be considered after other potential issues, like the IAC valve or vacuum leaks, have been ruled out.