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P0660 Mazda Code - Secondary Shutter Valve Open

Quick Answer

The P0660 diagnostic trouble code (DTC) in a Mazda indicates that there is an issue with the Secondary Shutter Valve being stuck open. Common causes include Faulty Secondary Shutter Valve, Wiring or electrical issues, Carbon buildup or debris causing the valve to stick. 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 Mazda indicates Secondary Shutter Valve Open.
Common causes
Common causes include Faulty Secondary Shutter Valve, Wiring or electrical issues, Carbon buildup or debris causing the valve to stick.
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 06, 2024
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Code P0660 Mazda Description

The P0660 diagnostic trouble code (DTC) in a Mazda indicates that there is an issue with the Secondary Shutter Valve being stuck open. The Secondary Shutter Valve is a component in the intake manifold that helps regulate airflow into the engine. When this valve is stuck open, it can disrupt the engine's air-fuel mixture, leading to poor performance, decreased fuel efficiency, and potential damage to other engine components. This can result in rough idling, decreased power output, and even stalling of the engine.

OBDII Code P0660 Mazda - Secondary Shutter Valve Open
P0660 Mazda Code - Secondary Shutter Valve Open

Common Causes of P0660 Mazda

  1. Faulty Secondary Shutter Valve
  2. Wiring or electrical issues
  3. Carbon buildup or debris causing the valve to stick
  4. Vacuum leaks in the intake system
  5. Issues with the engine control module (ECM)

Symptoms of P0660 Mazda

  1. Rough idling or engine misfires
  2. Decreased engine performance and responsiveness
  3. Reduced fuel efficiency
  4. Check Engine Light illuminated on the dashboard

How to Fix P0660 Mazda

  1. Perform a diagnostic scan to confirm the P0660 code and identify the specific issue with the Secondary Shutter Valve.
  2. Inspect the Secondary Shutter Valve for any signs of damage or sticking.
  3. Clean the valve and intake manifold to remove any carbon buildup or debris.
  4. Test the valve and wiring for proper functionality and repair or replace any faulty components.
  5. Clear the DTC and reset the ECM to see if the issue is resolved.

Cost to Fix P0660 Mazda

The cost of repairing a P0660 code in a Mazda can vary depending on the specific cause of the issue and the labor rates in your area. On average, you can expect to pay anywhere from $200 to $500 for parts and labor. Keep in mind that prices may be higher at dealerships or in metropolitan areas, while independent shops may offer more competitive rates. It's recommended to get a few quotes from local auto repair shops to get a more accurate estimate for your specific situation.

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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 Mazda Code

1. What are the common symptoms of OBDII code P0660 in a Mazda related to the Secondary Shutter Valve Open?

The common symptoms include rough idling, decreased fuel efficiency, and potential stalling of the engine.

2. What are the possible causes of OBDII code P0660 in a Mazda?

The code P0660 in a Mazda is typically caused by a faulty secondary shutter valve actuator or issues with the valve itself.

3. How can I diagnose the cause of OBDII code P0660 in my Mazda?

To diagnose the issue, you can visually inspect the secondary shutter valve and its actuator for any signs of damage or malfunction. You may also need to use a diagnostic scanner to retrieve specific trouble codes.

4. Can I continue driving my Mazda with OBDII code P0660?

It is not recommended to continue driving your Mazda with code P0660 as it can lead to further engine damage and decreased performance. It's best to have the issue diagnosed and repaired promptly.

5. How can I repair OBDII code P0660 related to the Secondary Shutter Valve Open in my Mazda?

Repairing code P0660 may involve replacing the faulty secondary shutter valve actuator or repairing any damaged components related to the valve. It's advisable to have a qualified mechanic perform the repair.

6. Are there any DIY tips for fixing OBDII code P0660 in a Mazda?

While some basic troubleshooting like checking for loose connections or damaged wires can be done DIY, repairing or replacing the secondary shutter valve components may require specialized tools and expertise.

7. Will resetting the OBDII system clear code P0660 in my Mazda?

Resetting the OBDII system may temporarily clear the code, but if the underlying issue causing P0660 is not addressed, the code is likely to reappear after driving the vehicle for some time.

8. What is the purpose of the Secondary Shutter Valve in a Mazda?

The Secondary Shutter Valve in a Mazda helps regulate the airflow to the engine, improving performance and fuel efficiency by adjusting the air intake at different engine speeds.

9. Can a dirty air filter cause OBDII code P0660 in a Mazda?

While a dirty air filter can impact engine performance, it is unlikely to directly cause code P0660 related to the Secondary Shutter Valve Open. The issue is more likely related to the valve actuator or the valve itself.

10. Is OBDII code P0660 a common issue in Mazda vehicles?

Code P0660 related to the Secondary Shutter Valve Open is not extremely common in Mazda vehicles, but it can occur due to wear and tear or electrical malfunctions in the valve system.

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