AutoCodes – Chevrolet – B3773 Chevrolet

B3773 Chevrolet Code - Air Flow Control 7 Feedback Circuit Short to Ground or Open

Quick Answer

The Auxiliary 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 Recirculation Door Actuator, Recirculation Door Actuator harness is open or shorted, Recirculation Door 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: B3773 Chevrolet indicates Air Flow Control 7 Feedback Circuit Short to Ground or Open.
Common causes: Common causes include Faulty Recirculation Door Actuator, Recirculation Door Actuator harness is open or shorted, Recirculation Door 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 571

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
Cost to Diagnose
FAQs
Comments
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Code B3773 Chevrolet Description

The Auxiliary 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 HVAC control module supplies the actuator motor with a 12-volt control circuit and a ground control circuit. The HVAC module controls the direction of the actuator door by changing the polarity of the control circuits.

OBDII Code B3773 Chevrolet - Air Flow Control 7 Feedback Circuit Short to Ground or Open - AutoCodes.com — B3773 Chevrolet Code - Air Flow Control 7 Feedback Circuit Short to Ground or Open

What does this mean?

What are the Possible Causes of the DTC B3773 Chevrolet?

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

How to Fix the DTC B3773 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 B3773 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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Need more information on how to fix the B3773 Chevrolet code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B3773 Chevrolet 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 B3773 Chevrolet Code

1. What are the common symptoms of OBDII code B3773 in a Chevrolet related to the Air Flow Control 7 Feedback Circuit?

- Common symptoms include rough idling, poor acceleration, and potential stalling of the vehicle.

2. What does the OBDII code B3773 Chevrolet indicate about the Air Flow Control 7 Feedback Circuit?

- This code indicates a short to ground or an open circuit in the Air Flow Control 7 Feedback system.

3. What are the possible causes of OBDII code B3773 in a Chevrolet vehicle?

- Possible causes include damaged wiring, a faulty Air Flow Control 7 feedback sensor, or a problem with the vehicle's ECU.

4. How can I diagnose the issue causing OBDII code B3773 in my Chevrolet?

- You can use a multimeter to test the wiring for continuity, inspect the Air Flow Control 7 sensor for damage, and scan the ECU for any related error codes.

5. Is it safe to continue driving with OBDII code B3773 triggered in my Chevrolet?

- It is not recommended to drive with this code active, as it can lead to poor engine performance and potential further damage if left unresolved.

6. Can I repair OBDII code B3773 Chevrolet related to the Air Flow Control 7 Feedback Circuit on my own?

- This repair may require advanced knowledge and tools. It is advisable to consult a professional mechanic for proper diagnosis and repair.

7. How much does it typically cost to fix OBDII code B3773 in a Chevrolet vehicle?

- The cost of repairs can vary depending on the exact cause of the issue, but it may range from $100 to $300 or more, including parts and labor.

8. Are there any preventative maintenance measures to avoid triggering OBDII code B3773 in the future?

- Regularly checking and maintaining the health of your vehicle's sensors, wiring, and ECU can help prevent issues like this code from occurring.

9. Can a faulty Air Flow Control 7 Feedback sensor be cleaned or repaired, or does it need to be replaced?

- In most cases, a faulty sensor will need to be replaced, as cleaning or repairing may not fully resolve the issue causing OBDII code B3773.

10. How long does it typically take to repair OBDII code B3773 related to the Air Flow Control 7 Feedback Circuit in a Chevrolet?

- The repair time can vary depending on the exact cause of the issue and the availability of parts, but it may take a few hours to a full day for a professional mechanic to diagnose and fix the problem.