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Engine-Codes – Ford – P0660 1999 Ford F150

P0660 1999 Ford F150 Code - Intake Manifold Tuning Valve circuit Malfunction

Quick Answer

The P0660 diagnostic trouble code (DTC) for a 1999 Ford F150 indicates a malfunction in the Intake Manifold Tuning Valve (IMTV) circuit. Common causes include Faulty Intake Manifold Tuning Valve, Wiring issues or electrical connection problems, Vacuum leaks in the intake manifold system. 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
P0660 1999 Ford F150 indicates Intake Manifold Tuning Valve circuit Malfunction.
Common causes
Common causes include Faulty Intake Manifold Tuning Valve, Wiring issues or electrical connection problems, Vacuum leaks in the intake manifold system.
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.
What is this?
Table of contents Created and updated by William Orellana on Sep 15, 2024
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Code P0660 1999 Ford F150 Description

The P0660 diagnostic trouble code (DTC) for a 1999 Ford F150 indicates a malfunction in the Intake Manifold Tuning Valve (IMTV) circuit. The IMTV is a component of the intake manifold system that helps regulate airflow into the engine. When this valve malfunctions, it can lead to a variety of issues that affect the vehicle's performance.

OBDII Code P0660 1999 Ford F150 - Intake Manifold Tuning Valve circuit Malfunction
P0660 1999 Ford F150 Code - Intake Manifold Tuning Valve circuit Malfunction

Common Causes of P0660 1999 Ford F150

  1. Faulty Intake Manifold Tuning Valve
  2. Wiring issues or electrical connection problems
  3. Vacuum leaks in the intake manifold system
  4. Carbon buildup in the IMTV system
  5. Engine control module (ECM) failure

Symptoms of P0660 1999 Ford F150

  1. Rough idle
  2. Engine misfires
  3. Decreased fuel efficiency
  4. Stalling or difficulty starting
  5. Loss of power during acceleration

How to Fix P0660 1999 Ford F150

  1. Begin by conducting a visual inspection of the IMTV and its wiring harness to check for any obvious signs of damage or disconnection.
  2. Use a multimeter to test the continuity of the IMTV circuit and ensure that it is receiving the proper voltage.
  3. Inspect the intake manifold system for any vacuum leaks and repair or replace any damaged components.
  4. Clean the IMTV system to remove any carbon buildup that may be affecting its operation.
  5. If necessary, replace the faulty IMTV or repair any wiring issues to restore proper functionality.

Cost to Fix P0660 1999 Ford F150

The cost of repairing a P0660 code on a 1999 Ford F150 can vary depending on the specific cause of the issue and the labor rates at the repair shop. On average, the parts for this repair can range from $100 to $300, while labor costs can range from $150 to $400. Overall, the total repair cost may fall between $250 and $700. It is recommended to obtain quotes from local repair shops to get a more accurate estimate based on your location and vehicle.

What does this mean?

Tech Notes for P0660 1999 Ford F150

The IMTV system is monitored for failure during continuous, key ON engine OFF or key ON engine running self-test. The test fails when the signal on the monitor pin is more or less than an the expected calibrated range.

When is the Code Detected?

The Engine Control Module (ECM) has detected an improper signal from the Intake Manifold Tuning Valve (IMTV)

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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 P0660 1999 Ford F150 Code

1. What are the common symptoms of OBDII code P0660 in a 1999 Ford F150?

- Common symptoms include poor engine performance, rough idling, reduced fuel efficiency, and the illumination of the Check Engine Light.

2. What does the OBDII code P0660 indicate in a 1999 Ford F150?

- OBDII code P0660 indicates a malfunction in the Intake Manifold Tuning Valve circuit in a 1999 Ford F150.

3. What are the possible causes of the Intake Manifold Tuning Valve circuit malfunction in a 1999 Ford F150?

- Possible causes include a faulty Intake Manifold Tuning Valve, damaged wiring or connectors, a defective PCM (Powertrain Control Module), or a vacuum leak.

4. How can I diagnose the Intake Manifold Tuning Valve circuit malfunction in my 1999 Ford F150?

- Diagnosis involves using an OBDII scanner to retrieve the specific trouble code, inspecting the wiring and connectors for damage, testing the resistance of the IMT valve, and checking for vacuum leaks.

5. Can I continue driving my 1999 Ford F150 with the P0660 code?

- It is not recommended to continue driving with the P0660 code illuminated as it can lead to further damage and reduced engine performance. It's best to address the issue promptly.

6. How can I repair the Intake Manifold Tuning Valve circuit malfunction in my 1999 Ford F150?

- Repair options may include replacing the Intake Manifold Tuning Valve, repairing damaged wiring or connectors, resetting the PCM, or fixing any vacuum leaks present.

7. Will resetting the PCM clear the P0660 code in my 1999 Ford F150?

- Resetting the PCM may temporarily clear the code, but if the underlying issue is not addressed, the code is likely to reappear.

8. Is it possible to drive my 1999 Ford F150 without fixing the Intake Manifold Tuning Valve circuit issue?

- While it may be possible to drive the vehicle, it is not recommended as it can lead to reduced fuel efficiency, poor engine performance, and potential long-term damage.

9. How much does it typically cost to repair the Intake Manifold Tuning Valve circuit issue in a 1999 Ford F150?

- The cost of repair can vary depending on the root cause of the issue, but it may range from $200 to $500, including parts and labor.

10. Can a DIY enthusiast fix the Intake Manifold Tuning Valve circuit issue in a 1999 Ford F150?

- Depending on the individual's skill level and access to tools, a DIY enthusiast may be able to address the issue by following a repair manual or online guides. However, if unsure, it's best to consult a professional mechanic.

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