AutoCodes – Chevrolet – P2077 Chevrolet

P2077 Chevrolet 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 Chevrolet 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 2,599

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

What does this mean?

What are the Possible Causes of the DTC P2077 Chevrolet?

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 Chevrolet?

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 Chevrolet 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 Chevrolet Code

1. What does the OBDII code P2077 mean on a Chevrolet?

P2077 indicates an issue with the Intake Manifold Tuning Valve Position Sensor Circuit, specifically detecting a low voltage condition.

2. What are the common symptoms of a P2077 code in a Chevrolet?

Symptoms can include reduced engine performance, poor fuel economy, rough idling, and an illuminated check engine light.

3. What causes the P2077 code to appear on a Chevrolet?

Common causes include a faulty intake manifold tuning valve, damaged wiring or connectors, a failed position sensor, or carbon buildup causing the valve to stick.

4. Can I drive my Chevrolet with a P2077 code?

While the vehicle may still be drivable, prolonged operation with this code can lead to decreased performance and potential engine damage. It's best to address the issue promptly.

5. How do I diagnose a P2077 code on a Chevrolet?

Start by inspecting the intake manifold tuning valve, wiring, and connectors for damage. Use a multimeter to test the voltage at the sensor and check for proper operation of the valve.

6. How do I fix the P2077 code on a Chevrolet?

Repairs may include cleaning or replacing the intake manifold tuning valve, repairing damaged wiring or connectors, or replacing the position sensor if it's faulty.

7. Can carbon buildup cause the P2077 code on a Chevrolet?

Yes, carbon buildup can cause the intake manifold tuning valve to stick, leading to a P2077 code. Cleaning the valve may resolve the issue.

8. How much does it cost to repair a P2077 code on a Chevrolet?

Repair costs vary but typically range from $150 to $500, depending on whether cleaning, sensor replacement, or valve replacement is needed.

9. Will clearing the code fix the P2077 issue on my Chevrolet?

Clearing the code will temporarily turn off the check engine light, but the issue will likely return unless the underlying problem is repaired.

10. Does the P2077 code affect emissions on a Chevrolet?

Yes, a malfunctioning intake manifold tuning valve can impact engine efficiency and increase emissions, potentially causing your vehicle to fail an emissions test.