AutoCodes – Ford – P1506 2002 Ford F150

P1506 2002 Ford F150 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 2002 Ford F150 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.
AI answers can be wrong. Verify repairs with testing. Open full chat
Code Popularity 5,988
How popular is this code, among other codes? Low
Table of contents Created and updated by William Orellana on Aug 25, 2019
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Code P1506 2002 Ford F150 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 2002 Ford F150 - Idle Air Control Overspeed Error - AutoCodes.com
P1506 2002 Ford F150 Code - Idle Air Control Overspeed Error

What are the Possible Causes of the DTC P1506 2002 Ford F150?

  • 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 2002 Ford F150?

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.

Code Tech Notes

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P1506 2002 Ford F150 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.

Need more information about the P1506 2002 Ford F150 code?

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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 2002 Ford F150 Code

1. What are the common symptoms of OBDII code P1506 in a 2002 Ford F150?

- Common symptoms include rough idle, stalling at idle, fluctuating idle speed, and potential engine hesitation.

2. What does the OBDII code P1506 indicate in a 2002 Ford F150?

- OBDII code P1506 indicates an Idle Air Control Overspeed Error, meaning the engine's idle speed control system is detecting an error related to the idle air control valve.

3. What are the possible causes of OBDII code P1506 in a 2002 Ford F150?

- Possible causes include a faulty idle air control valve, vacuum leaks, dirty throttle body, electrical issues, or a problem with the idle air control system.

4. How can I diagnose the cause of OBDII code P1506 in my 2002 Ford F150?

- Diagnose by checking for vacuum leaks, inspecting the idle air control valve, cleaning the throttle body, and testing the electrical connections related to the idle air control system.

5. Can I continue driving my 2002 Ford F150 with OBDII code P1506?

- It is not recommended to drive with code P1506 present, as it can lead to poor engine performance, stalling, and potential damage to engine components over time.

6. How can I repair OBDII code P1506 in my 2002 Ford F150?

- Repair options include replacing the idle air control valve, fixing any vacuum leaks, cleaning the throttle body, and addressing any electrical issues in the idle air control system.

7. Will resetting the OBDII code P1506 in my 2002 Ford F150 make it go away permanently?

- Resetting the code may temporarily make it go away, but if the underlying issue causing the code is not fixed, it is likely to return.

8. Can a DIY enthusiast fix OBDII code P1506 in a 2002 Ford F150?

- Depending on their skill level, a DIY enthusiast can attempt to fix code P1506 by following repair guides, but it may be best to consult a professional for accurate diagnosis and repair.

9. How much does it typically cost to repair OBDII code P1506 in a 2002 Ford F150?

- The cost of repair can vary based on the cause of the code and whether you choose to fix it yourself or take it to a mechanic. Costs can range from under $100 for DIY repairs to a few hundred dollars at a repair shop.

10. Are there any preventive measures to avoid OBDII code P1506 in a 2002 Ford F150?

- Regular maintenance, such as cleaning the throttle body, inspecting vacuum lines, and addressing any idle issues promptly, can help prevent the occurrence of code P1506 in your Ford F150.

Discuss the causes and fixes for P1506 2002 Ford F150 OBDII Code

  • Hi my name is Patrick and I have a 2002 f150 with a 4.6. I got this P1506 code and I replaced the PCV valve and the factory supply line. both things where in bad shape. I thought I had it but the high idle came back. it is idling at 14 to 1500 in neutral . when I put into drive it idle drops to about 600. It did look like the line for the PCV valve was leaking and the PCV valve was sticking . I do have 262k 0n the motor and it runs great, anything else I can look at or test. Also I did not do the procedure to have the idle relearned that was mentioned drive 5 min with lights on and ac on. Is this the procedure used to relearn the idle?

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