P0660 Code: Intake Manifold Tuning Valve Control Circuit Open / Open Bank 1

The intake manifold tuning valve (or intake manifold runner valve) is integral to the function of your intake manifold. This component refers to the actuator that’s part of the system responsible for opening and closing the flaps inside your vehicle’s intake manifold. If your ride’s power control module (PCM) detects an electrical fault or an open electrical circuit, it will trigger the P0660 code.

What Does the P0660 Code Mean?

Diagnostic Trouble Code (DTC) P0660 stands for “Intake Manifold Tuning Valve Control Circuit Open/Open Bank 1.”

The intake manifold tuning valve opens and closes the flap in your intake manifold. It regulates the pressure between intake plenums and is also responsible for redirecting air to the right intake runners, aiding in driveability and engine performance.

The code P0660 may be logged if the PCM detects that there’s a mechanical or electrical fault in the intake manifold tuning valve located in bank #1. This usually refers to the side of the engine where cylinder #1 is located.

There’s a greater chance for the valve to malfunction and fail to rotate under the PCM’s command if you’re living in an area with extremely cold weather.

For more information that can help you further understand codes like P0660, read our technical discussion about different Intake manifold runner control configurations.

Note: The definition of code P0660 code may be different per vehicle manufacturer. Consult the appropriate repair manual or repair database for the exact code definition.

What are the Possible Causes of the P0660 Code?

• Bad intake manifold runner valve
• Stuck valve
• Wiring problems and/or broken electrical connectors
• Contaminated valve
• Broken valve components
• Extreme cold temperature

What are the Common Symptoms of the P0660 Code?

• Decreased engine performance
• Bad fuel economy
• Engine misfire during start-up
• Cold start problems
• Power range changes
• Loud clicking noise from the engine bay

How to Diagnose the P0660 Code

DTC P0660 is a generic code that may be logged in various makes and models. Although the symptoms and causes for this trouble code might be similar across different automakers, the steps for diagnosis and repair may vary depending on the specific vehicle that you own.

We recommend taking your vehicle to an auto repair shop if you don’t have the appropriate tools and know-how to work on it yourself. Watch this video for more information on what the diagnostic procedure for this trouble code might involve:

How to Fix the P0660 Code

Fixing any code isn’t easy, and DTC P0660 is no exception. If you’re not familiar with this type of repair, it’s best to leave the job to a professional. A trained mechanic would know the specific steps that will work for your vehicle’s engine. If you plan on fixing your car yourself, we recommend consulting a repair manual or an online repair database for vehicle-specific information.