AutoCodes – Ford – P1506 2001 Ford F150

P1506 2001 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 2001 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.

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Code Popularity 5,478

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 2001 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 2001 Ford F150 - Idle Air Control Overspeed Error - AutoCodes.com — P1506 2001 Ford F150 Code - Idle Air Control Overspeed Error

What does this mean?

What are the Possible Causes of the DTC P1506 2001 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 2001 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.

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 2001 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.

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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 2001 Ford F150 Code

1. What are the common symptoms of OBDII code P1506 in a 2001 Ford F150?

- Common symptoms include fluctuating or high idle speed, stalling at idle, and potential rough idling.

2. What does the OBDII code P1506 Idle Air Control Overspeed Error indicate in a 2001 Ford F150?

- This code indicates that the Idle Air Control (IAC) system is operating at a speed higher than expected, causing issues with the engine's idle speed control.

3. What are some possible causes of the P1506 code in a 2001 Ford F150?

- Potential causes include a faulty Idle Air Control valve, a vacuum leak, a dirty throttle body, a malfunctioning Mass Air Flow sensor, or a problem with the engine's computer system.

4. How can I diagnose the cause of the P1506 code in my 2001 Ford F150?

- Diagnosing the code may involve checking for vacuum leaks, inspecting the IAC valve for proper operation, cleaning the throttle body, and testing the Mass Air Flow sensor for any issues.

5. How can I repair the P1506 code in my 2001 Ford F150?

- Repair options may include replacing the faulty IAC valve, fixing any vacuum leaks, cleaning the throttle body, replacing the Mass Air Flow sensor if necessary, or resetting the engine's computer system.

6. Can driving with the P1506 code present cause any further damage to my 2001 Ford F150?

- Driving with the code may lead to poor engine performance, reduced fuel efficiency, and potential damage to other engine components over time if left unresolved.

7. Is it safe to continue driving my 2001 Ford F150 with the P1506 code active?

- It is generally not recommended to drive with the code active, as it can affect the engine's performance and lead to potential safety issues.

8. How much does it typically cost to repair the P1506 code in a 2001 Ford F150?

- The cost of repairs can vary depending on the exact cause of the code, but it may range from a few hundred to over a thousand dollars, including parts and labor.

9. Can I reset the OBDII code P1506 in my 2001 Ford F150 using an OBDII scanner?

- Yes, an OBDII scanner can be used to reset the code after addressing the underlying issue, but it is important to diagnose and repair the problem first to prevent the code from reoccurring.

10. How often does the P1506 code occur in a 2001 Ford F150, and is it a common issue?

- The P1506 code may occur sporadically or more frequently depending on the driving conditions and maintenance of the vehicle. It is a relatively common issue in vehicles with an IAC system.