AutoCodes – Pontiac – B3779 Pontiac

B3779 Pontiac Code - Air Flow Control 9

Quick Answer

The Heating, Ventilation, and Air Conditioning (HVAC) control module controls the HVAC door actuators to regulate the airflow through the HVAC system. Common causes include Faulty Mode Actuator, Mode Actuator harness is open or shorted, Mode Actuator 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: B3779 Pontiac indicates Air Flow Control 9.
Common causes: Common causes include Faulty Mode Actuator, Mode Actuator harness is open or shorted, Mode Actuator 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 851

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 Mar 16, 2020

Description
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code B3779 Pontiac Description

The Heating, Ventilation, and Air Conditioning (HVAC) control module controls the HVAC door actuators to regulate the airflow through the HVAC system. Each actuator consists of an electric motor and a potentiometer. The module supplies a low reference and 5-volt reference source voltage to the potentiometer. The HVAC control module monitors the voltage drop across the potentiometer on the door position signal circuit. When the actuator shaft rotates, the voltage on the door position signal circuit changes. The control circuit uses either a 0, 2.5 or 5-volt signal to command the actuator movement. When the actuator is at rest, the control circuit value is 2.5 volts. A 0 or 5-volt control signal commands the actuator movement in opposite directions.

OBDII Code B3779 Pontiac - Air Flow Control 9 - AutoCodes.com — B3779 Pontiac Code - Air Flow Control 9

What does this mean?

What are the Possible Causes of the DTC B3779 Pontiac?

Faulty Mode Actuator
Mode Actuator harness is open or shorted
Mode Actuator circuit poor electrical connection
Faulty Heating and Cooling Systems (HVAC) Control Module

How to Fix the DTC B3779 Pontiac?

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 does this mean?

Code Tech Notes

B3779 02 Air Flow Control 9 Feedback Circuit Short to Ground
B3779 05 Air Flow Control 9 Feedback Circuit Short to Battery or Open
B3779 61 Air Flow Control 9 Circuit Actuator Stuck

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the B3779 Pontiac 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.

Need more information about the B3779 Pontiac code?

Need more information on how to fix the B3779 Pontiac code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B3779 Pontiac code diagnosed by a professional: Find a repair shop in your area

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 B3779 Pontiac Code

1. What are the common symptoms of OBDII code B3779 in a Pontiac related to Air Flow Control 9?

Symptoms may include rough idling, poor engine performance, and decreased fuel efficiency.

2. What are the possible causes of OBDII code B3779 in a Pontiac concerning Air Flow Control 9?

Causes may include a faulty air flow sensor, issues with the air intake system, or a problem with the engine control module.

3. How can I diagnose the OBDII code B3779 in my Pontiac related to Air Flow Control 9?

You can diagnose this code using an OBDII scanner to read the specific error codes and then perform a visual inspection of the air flow sensor and intake system.

4. Can I drive my Pontiac with OBDII code B3779 related to Air Flow Control 9?

It is not recommended to drive your vehicle with this code as it can lead to further engine damage and poor performance.

5. How can I repair OBDII code B3779 in my Pontiac concerning Air Flow Control 9?

Repair options may include cleaning or replacing the air flow sensor, checking and repairing any air intake leaks, or resetting the engine control module.

6. Is it safe to ignore OBDII code B3779 in my Pontiac related to Air Flow Control 9?

Ignoring this code can lead to potential engine damage and worsened fuel efficiency, so it is best to address the issue promptly.

7. Can a DIY enthusiast fix OBDII code B3779 in a Pontiac by themselves?

Depending on your skill level and access to tools, you may be able to address this code yourself by following repair guides or seeking assistance from professionals.

8. How much does it typically cost to repair OBDII code B3779 related to Air Flow Control 9 in a Pontiac?

Repair costs can vary based on the specific issue causing the code, but it is recommended to get a diagnosis from a mechanic to determine the exact cost.

9. Will resetting the OBDII system clear the B3779 code in my Pontiac?

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

10. How often should I check for OBDII code B3779 in my Pontiac related to Air Flow Control 9?

It is a good practice to regularly check your vehicle for any OBDII codes, including B3779, especially if you notice any unusual symptoms or changes in performance.