AutoCodes – Ford – P1507 2003 Ford F150

P1507 2003 Ford F150 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 2003 Ford F150 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 5,585

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 2003 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 P1507 2003 Ford F150 - Idle Air Control Under Speed Error - AutoCodes.com — P1507 2003 Ford F150 Code - Idle Air Control Under Speed Error

What does this mean?

What are the Possible Causes of the DTC P1507 2003 Ford F150?

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 2003 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 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 2003 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 P1507 2003 Ford F150 Code

1. What are the common symptoms of OBDII code P1507 in a 2003 Ford F150?

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

2. What does the OBDII code P1507 "Idle Air Control Under Speed Error" indicate in a 2003 Ford F150?

- This code indicates that the idle air control system is not operating within the expected parameters, specifically indicating an idle speed lower than expected.

3. What are the possible causes of OBDII code P1507 in a 2003 Ford F150?

- Possible causes include a faulty idle air control valve, vacuum leaks, a dirty throttle body, a malfunctioning throttle position sensor, or issues with the engine's air intake system.

4. How can I diagnose the OBDII code P1507 in a 2003 Ford F150?

- Diagnosing this code may involve checking for vacuum leaks, cleaning the throttle body, testing the idle air control valve, inspecting the throttle position sensor, and ensuring proper air intake system function.

5. Can I continue driving my 2003 Ford F150 with OBDII code P1507?

- It is not recommended to continue driving with this code as it can lead to further engine issues and potentially affect the vehicle's performance and fuel efficiency.

6. How can I repair OBDII code P1507 in a 2003 Ford F150?

- Repairing this code may involve cleaning or replacing the idle air control valve, addressing any vacuum leaks, cleaning the throttle body, testing and potentially replacing the throttle position sensor, and ensuring proper air intake system function.

7. Will resetting the OBDII code P1507 in a 2003 Ford F150 make it go away permanently?

- Resetting the code may temporarily clear the warning light, but if the underlying issue is not addressed, the code is likely to reappear once the problem is detected again during engine operation.

8. How much does it typically cost to repair OBDII code P1507 in a 2003 Ford F150?

- The cost of repair can vary depending on the specific cause of the issue, but it may range from a few hundred to a thousand dollars, including parts and labor.

9. Can a DIY enthusiast fix OBDII code P1507 in a 2003 Ford F150?

- Depending on the skill level and tools available, some DIY enthusiasts may be able to address simpler causes like cleaning the throttle body or replacing the idle air control valve. However, more complex issues may require professional assistance.

10. How often does OBDII code P1507 occur in a 2003 Ford F150?

- The occurrence of this code may vary depending on the vehicle's maintenance history, driving conditions, and other factors. If proper maintenance is upheld, the likelihood of encountering this code can be reduced.