AutoCodes – Ford – P1507 1997 Ford F150

P1507 1997 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 1997 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 4,064

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 1997 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 1997 Ford F150 - Idle Air Control Under Speed Error - AutoCodes.com — P1507 1997 Ford F150 Code - Idle Air Control Under Speed Error

What does this mean?

What are the Possible Causes of the DTC P1507 1997 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 1997 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 1997 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 1997 Ford F150 Code

1. What is OBDII code P1507 on a 1997 Ford F150?

Code P1507 indicates an Idle Air Control Under Speed Error on a 1997 Ford F150, meaning the engine's idle speed is lower than expected.

2. What are the common symptoms of OBDII code P1507 in a 1997 Ford F150?

Common symptoms of code P1507 on a 1997 Ford F150 include rough idle, stalling at idle, and potential difficulty starting the vehicle.

3. What are the possible causes of OBDII code P1507 on a 1997 Ford F150?

Possible causes of code P1507 on a 1997 Ford F150 include a faulty idle air control valve, vacuum leaks, dirty throttle body, or issues with the engine's air intake system.

4. How can I diagnose OBDII code P1507 on my 1997 Ford F150?

To diagnose code P1507 on a 1997 Ford F150, you can start by checking for vacuum leaks, inspecting the idle air control valve, cleaning the throttle body, and ensuring the air intake system is free from debris.

5. How can I repair OBDII code P1507 on my 1997 Ford F150?

Repairing code P1507 on a 1997 Ford F150 may involve replacing the idle air control valve, fixing any vacuum leaks, cleaning the throttle body, and addressing any issues with the air intake system.

6. Can driving with OBDII code P1507 on a 1997 Ford F150 cause further damage?

Continued driving with code P1507 on a 1997 Ford F150 can potentially lead to poor engine performance, reduced fuel efficiency, and increased emissions. It is recommended to address the issue promptly.

7. Can I reset OBDII code P1507 on a 1997 Ford F150 without fixing the underlying issue?

Resetting code P1507 on a 1997 Ford F150 without addressing the root cause may temporarily turn off the check engine light, but the issue is likely to recur if the underlying problem is not fixed.

8. How much does it typically cost to repair OBDII code P1507 on a 1997 Ford F150?

The cost to repair code P1507 on a 1997 Ford F150 can vary depending on the specific cause of the issue, but it may range from $100 to $500 or more, including parts and labor.

9. Can a DIY enthusiast fix OBDII code P1507 on a 1997 Ford F150?

Depending on their skills and tools, a DIY enthusiast may be able to address code P1507 on a 1997 Ford F150 by following repair guides, but complex issues may require professional assistance.

10. How often does OBDII code P1507 occur in a 1997 Ford F150?

Code P1507 can occur sporadically or persistently in a 1997 Ford F150, depending on the severity of the underlying issue and driving conditions. Regular maintenance can help prevent its occurrence.