AutoCodes – Buick – P2077 Buick

P2077 Buick Code - Intake Manifold Tuning Valve Position Sensor Circuit Low Voltage

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: P2077 Buick indicates Intake Manifold Tuning Valve Position Sensor Circuit Low Voltage.
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 371

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 P2077 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 P2077 Buick - Intake Manifold Tuning Valve Position Sensor Circuit Low Voltage - AutoCodes.com — P2077 Buick Code - Intake Manifold Tuning Valve Position Sensor Circuit Low Voltage

What does this mean?

What are the Possible Causes of the DTC P2077 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 P2077 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 P2077 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 P2077 Buick Code

1. What are the common symptoms of OBDII code P2077 in a Buick related to the intake manifold tuning valve position sensor circuit low voltage?

The common symptoms include poor engine performance, reduced fuel efficiency, rough idling, and potentially stalling of the vehicle.

2. What are the possible causes of OBDII code P2077 in a Buick?

The code P2077 in a Buick is typically caused by a faulty intake manifold tuning valve, damaged wiring or connectors in the circuit, or a malfunctioning intake manifold tuning valve position sensor.

3. How can I diagnose the issue causing OBDII code P2077 in my Buick?

Diagnosing the issue involves checking the intake manifold tuning valve, inspecting the wiring and connectors for any damage, and testing the intake manifold tuning valve position sensor using a multimeter.

4. Can I continue driving my Buick with OBDII code P2077 present?

It is not recommended to drive your Buick with code P2077 present, as it can lead to further damage to the engine and negatively impact vehicle performance.

5. How can I repair OBDII code P2077 in my Buick?

Repairing code P2077 involves replacing the faulty intake manifold tuning valve, repairing any damaged wiring or connectors, or replacing the intake manifold tuning valve position sensor.

6. Are there any DIY tips for fixing OBDII code P2077 in a Buick?

While some simple checks like inspecting wiring connections can be done DIY, it is recommended to consult a professional mechanic for a thorough diagnosis and repair of code P2077.

7. Will resetting the OBDII system make code P2077 disappear permanently?

Resetting the OBDII system may temporarily clear the code, but if the underlying issue causing P2077 is not addressed, the code is likely to reappear.

8. Can a dirty intake manifold cause OBDII code P2077 in a Buick?

While a dirty intake manifold may affect engine performance, code P2077 is specifically related to the intake manifold tuning valve position sensor circuit and would not directly be caused by a dirty intake manifold.

9. Is OBDII code P2077 a serious issue in a Buick that needs immediate attention?

Code P2077 should be addressed promptly to avoid further engine damage and performance issues. It is recommended to have the issue diagnosed and repaired as soon as possible.

10. How much does it typically cost to repair OBDII code P2077 in a Buick?

The cost of repairing code P2077 can vary depending on the specific cause of the issue, but it may range from $200 to $500 for parts and labor.