AutoCodes – Hummer – B3782 Hummer

B3782 Hummer Code - Air Flow Control 10 Feedback Circuit Malfunction

Quick Answer

The actuators operate using 5 circuits. Common causes include Faulty Auxiliary Mode Actuator, Auxiliary Mode Actuator harness is open or shorted, Auxiliary 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: B3782 Hummer indicates Air Flow Control 10 Feedback Circuit Malfunction.
Common causes: Common causes include Faulty Auxiliary Mode Actuator, Auxiliary Mode Actuator harness is open or shorted, Auxiliary 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 3,221

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 15, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B3782 Hummer Description

The actuators operate using 5 circuits. A 5-volt reference, low reference, signal circuit and two bi-directional 0 or 12 volt control circuits. The Heating, Ventilation, and Air Conditioning (HVAC) Control Module supplies a low reference and 5-volt reference to the potentiometer. The HVAC control module monitors the voltage drop across the potentiometer on the door position signal circuit. As the actuator door changes position the door position signal circuit voltage also changes. The two bi-directional control circuits enable the actuator to operate. Both circuits are set to 0 volts when the HVAC control module detects, from the feedback potentiometer, that the actuator is in the desired position. In order to move the actuator, the HVAC control module switches the appropriate control circuit to 12 volts.

OBDII Code B3782 Hummer - Air Flow Control 10 Feedback Circuit Malfunction - AutoCodes.com — B3782 Hummer Code - Air Flow Control 10 Feedback Circuit Malfunction

What does this mean?

What are the Possible Causes of the DTC B3782 Hummer?

Faulty Auxiliary Mode Actuator
Auxiliary Mode Actuator harness is open or shorted
Auxiliary Mode Actuator circuit poor electrical connection
Faulty Auxiliary Heating, Ventilation, and Air Conditioning (HVAC) Control Module

How to Fix the DTC B3782 Hummer?

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 B3782 Hummer 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 B3782 Hummer Code

1. What are the common symptoms of OBDII code B3782 in a Hummer related to the Air Flow Control 10 Feedback Circuit Malfunction?

- Common symptoms may include engine stalling, rough idling, decreased fuel efficiency, and issues with acceleration.

2. What could cause the OBDII code B3782 to appear in a Hummer?

- The code could be triggered by a faulty air flow sensor, damaged wiring in the air flow control system, or a malfunctioning air flow control module.

3. How can I diagnose the Air Flow Control 10 Feedback Circuit Malfunction in my Hummer?

- To diagnose this issue, you can use an OBDII scanner to read the trouble codes and perform a visual inspection of the air flow control components for any visible damage.

4. Is it safe to continue driving my Hummer with the B3782 code related to the Air Flow Control 10 Feedback Circuit Malfunction?

- It is not recommended to drive the vehicle with this code present, as it can lead to further damage and potentially unsafe driving conditions.

5. Can I repair the OBDII code B3782 related to the Air Flow Control 10 Feedback Circuit Malfunction myself?

- Depending on your level of automotive repair experience, you may be able to address this issue by replacing the air flow sensor, repairing damaged wiring, or replacing the air flow control module.

6. Are there any quick fixes or temporary solutions for the Air Flow Control 10 Feedback Circuit Malfunction in my Hummer?

- Quick fixes may include checking and cleaning the air filter, ensuring proper connection of air flow control components, and resetting the trouble codes with an OBDII scanner.

7. How much does it typically cost to repair the B3782 code related to the Air Flow Control 10 Feedback Circuit Malfunction in a Hummer?

- The cost of repair can vary depending on the exact cause of the issue, but it may range from $100 to $500 for parts and labor.

8. Will resetting the OBDII codes make the B3782 code related to the Air Flow Control 10 Feedback Circuit Malfunction go away permanently?

- Resetting the codes may temporarily clear the warning light, but if the underlying issue is not addressed, the code is likely to reappear.

9. Can extreme weather conditions affect the appearance of the OBDII code B3782 in a Hummer?

- Extreme weather conditions can sometimes exacerbate existing issues related to the air flow control system, leading to the appearance of the B3782 code.

10. How can I prevent the Air Flow Control 10 Feedback Circuit Malfunction code from appearing in my Hummer in the future?

- Regular maintenance, such as replacing the air filter as recommended, checking the air flow control system for damage, and addressing any warning signs promptly, can help prevent this code from reoccurring.