AutoCodes – Cadillac – B3773 Cadillac

B3773 Cadillac 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 Cadillac 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 549

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 Cadillac 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 Cadillac - Air Flow Control 7 Feedback Circuit Short to Ground or Open - AutoCodes.com — B3773 Cadillac 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 Cadillac?

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 Cadillac?

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 Cadillac 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 Help with the Code?

Get the B3773 Cadillac 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 Cadillac Code

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

The common symptoms include rough idle, engine misfires, decreased fuel efficiency, and potential stalling of the vehicle.

2. What are the possible causes of OBDII code B3773 Cadillac Air Flow Control 7 Feedback Circuit Short to Ground or Open?

Possible causes include damaged wiring or connectors, a faulty Air Flow Control module, ECM issues, or sensor malfunctions.

3. How can I diagnose OBDII code B3773 in a Cadillac?

Diagnosing this code typically involves using a scan tool to read the code, inspecting the wiring and connectors for damage, and testing the Air Flow Control module and related components.

4. Can I drive my Cadillac with OBDII code B3773 present?

It is generally not recommended to drive your Cadillac with this code present, as it can lead to performance issues and potential further damage to the vehicle.

5. Is it safe to continue driving if my Cadillac experiences stalling due to OBDII code B3773?

If your Cadillac is stalling due to this code, it is best to have the issue addressed promptly to avoid potential safety hazards on the road.

6. How can I repair OBDII code B3773 related to the Air Flow Control 7 Feedback Circuit in my Cadillac?

Repairing this code may involve repairing or replacing damaged wiring, connectors, the Air Flow Control module, or addressing any underlying ECM or sensor issues.

7. Are there any DIY repair tips for OBDII code B3773 in a Cadillac?

While some basic inspections can be done at home, it is recommended to consult a professional mechanic for a proper diagnosis and repair of this code.

8. Will resetting the OBDII code B3773 in my Cadillac make it go away permanently?

Simply resetting the code may not permanently resolve the issue, as it is important to address the root cause of the problem to prevent the code from reappearing.

9. How much can I expect to pay to fix OBDII code B3773 in a Cadillac?

The cost of fixing this code can vary depending on the specific issue and the labor rates of the repair shop. It is advisable to get a few quotes from different mechanics.

10. Can a faulty Air Flow Control module cause OBDII code B3773 in a Cadillac?

Yes, a faulty Air Flow Control module is one of the potential causes of OBDII code B3773 related to the Air Flow Control 7 Feedback Circuit in a Cadillac.