AutoCodes – Buick – P0660 Buick

P0660 Buick Code - Intake Manifold Tuning Valve Solenoid Control Circuit

Quick Answer

An Intake Manifold Tuning (IMT) Valve is used to change the intake manifold plenum configuration. Common causes include Faulty Intake Manifold Tuning Valve, Intake Manifold Tuning Valve harness is open or shorted, Intake Manifold Tuning Valve circuit poor electrical connection. 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 Buick indicates Intake Manifold Tuning Valve Solenoid Control Circuit.
Common causes: Common causes include Faulty Intake Manifold Tuning Valve, Intake Manifold Tuning Valve harness is open or shorted, Intake Manifold Tuning Valve circuit poor electrical connection.
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 814

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Nov 13, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P0660 Buick Description

An Intake Manifold Tuning (IMT) Valve is used to change the intake manifold plenum configuration. When the IMT valve is open, the intake manifold is configured to one large plenum. When the IMT valve is closed, the intake manifold is configured to 2 smaller plenums. The IMT valve improves engine performance at low and high engine speeds depending on the engine load. The Diagnostic Trouble Code (DTC) will set when the control module detects that the state of the driver and the state of the circuit do not match. The control module will detect an open, short to ground on the variable tuning valve signal or an open or a short to ground on the ignition voltage circuit of the IMT valve solenoid for more than 6.25 seconds.

OBDII Code P0660 Buick - Intake Manifold Tuning Valve Solenoid Control Circuit - AutoCodes.com — P0660 Buick Code - Intake Manifold Tuning Valve Solenoid Control Circuit

What does this mean?

What are the Possible Causes of the DTC P0660 Buick?

Faulty Intake Manifold Tuning Valve
Intake Manifold Tuning Valve harness is open or shorted
Intake Manifold Tuning Valve circuit poor electrical connection

How to Fix the DTC P0660 Buick?

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 is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0660 Buick 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 P0660 Buick Code

1. What are the common symptoms of a P0660 OBDII code in a Buick?

- Common symptoms include rough idling, decreased fuel efficiency, engine misfires, and a reduction in overall engine performance.

2. What causes the P0660 code to trigger in a Buick?

- The P0660 code is typically triggered by a fault in the intake manifold tuning valve solenoid control circuit, which can be caused by wiring issues, a faulty solenoid, or a damaged intake manifold.

3. How can I diagnose the intake manifold tuning valve solenoid control circuit issue in my Buick?

- To diagnose the issue, you can use a scan tool to check for the P0660 code, visually inspect the wiring and connectors for any damage, and test the solenoid for proper functionality.

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

- It is not recommended to drive your Buick with a P0660 code, as it can lead to further damage to the engine and negatively impact performance and fuel efficiency.

5. How can I repair a P0660 code in my Buick?

- Repairing a P0660 code typically involves replacing the faulty intake manifold tuning valve solenoid and fixing any wiring issues or damaged connectors in the control circuit.

6. Are there any preventative maintenance tips to avoid a P0660 OBDII code in my Buick?

- Regularly inspecting the intake manifold components, keeping up with scheduled maintenance, and addressing any engine performance issues promptly can help prevent the occurrence of a P0660 code.

7. Can I reset the P0660 code in my Buick without fixing the underlying issue?

- While you can clear the code using a scan tool, it is crucial to address the root cause of the P0660 code to prevent it from reoccurring and causing further issues.

8. How long does it typically take to repair a P0660 OBDII code in a Buick?

- The repair time for a P0660 code can vary depending on the extent of the issue, but it usually takes a few hours to diagnose, replace the solenoid, and fix any related wiring problems.

9. Will a P0660 OBDII code cause my Buick to fail an emissions test?

- Yes, a P0660 code can cause your Buick to fail an emissions test due to the impact it has on engine performance and emissions control systems.

10. Is it possible to prevent a P0660 OBDII code from coming back after repair?

- Ensuring proper installation of the new intake manifold tuning valve solenoid, conducting thorough testing post-repair, and addressing any related issues can help prevent the recurrence of a P0660 code in your Buick.