AutoCodes – Ford – P1507 1998 Ford F150

P1507 1998 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 1998 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.
AI answers can be wrong. Verify repairs with testing. Open full chat
Code Popularity 3,660
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 P1507 1998 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 1998 Ford F150 - Idle Air Control Under Speed Error - AutoCodes.com
P1507 1998 Ford F150 Code - Idle Air Control Under Speed Error

What are the Possible Causes of the DTC P1507 1998 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 1998 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 P1507 1998 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 P1507 1998 Ford F150 code?

Need more information on how to fix the P1507 1998 Ford F150 code? Get Access to Factory Service Manuals

Need Help with the 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 P1507 1998 Ford F150 Code

1. What are the common symptoms of OBDII code P1507 in a 1998 Ford F150?

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

2. What does the OBDII code P1507 on a 1998 Ford F150 indicate?

- The code P1507 indicates an Idle Air Control Under Speed Error, which means the engine idle speed is below the expected range.

3. What are the possible causes of OBDII code P1507 in a 1998 Ford F150?

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

4. How can I diagnose the cause of OBDII code P1507 in my 1998 Ford F150?

- Diagnose by checking the idle air control valve for proper operation, inspecting for vacuum leaks, cleaning the throttle body, testing the mass airflow sensor, and ensuring the air intake system is in good condition.

5. Can I drive my 1998 Ford F150 with OBDII code P1507?

- It is not recommended to drive the vehicle with this code as it can lead to poor engine performance, stalling, and potential damage to engine components.

6. How can I repair OBDII code P1507 in a 1998 Ford F150?

- Repair options include replacing the idle air control valve, fixing any vacuum leaks, cleaning the throttle body, replacing the mass airflow sensor if necessary, and ensuring the air intake system is free from obstructions.

7. Will resetting the OBDII code P1507 in my 1998 Ford F150 make it go away permanently?

- Resetting the code may temporarily clear the check engine light, but if the underlying issue causing the code is not fixed, it is likely to reappear.

8. Can a DIY enthusiast fix OBDII code P1507 in a 1998 Ford F150?

- Yes, some basic repairs such as cleaning the throttle body or checking for vacuum leaks can be done by a DIY enthusiast, but more complex issues may require professional help.

9. How much does it typically cost to repair OBDII code P1507 in a 1998 Ford F150?

- The cost of repairs can vary depending on the specific cause of the code, but it may range from $100 to $500 or more, including parts and labor.

10. Is OBDII code P1507 a common issue in 1998 Ford F150 vehicles?

- While not extremely common, OBDII code P1507 can still occur in 1998 Ford F150 vehicles, especially as they age and components wear out.

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