AutoCodes – Buick – B0272 Buick

B0272 Buick Code - Air Flow Control 7 Circuit Open

Quick Answer

Stepper motors are used for temperature regulation, air distribution control and recirculation door control. Common causes include Faulty Recirculation Actuator, Recirculation Actuator harness is open or shorted, Recirculation Actuator circuit poor electrical connection. Severity is Low - monitor the vehicle and repair when practical. The vehicle can usually be driven if no severe symptoms are present, but symptoms should be checked before extended driving.

What it means: B0272 Buick indicates Air Flow Control 7 Circuit Open.
Common causes: Common causes include Faulty Recirculation Actuator, Recirculation Actuator harness is open or shorted, Recirculation Actuator circuit poor electrical connection.
Severity: Low - monitor the vehicle and repair when practical.
Can I drive?: The vehicle can usually be driven if no severe symptoms are present, but symptoms should be checked before extended driving.

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Code Popularity 1,214

How popular is this code, among other codes? Low

Repair Importance Level

Low (Monitor) (1 / 3)

Repair Difficulty Level

Intermediate (2 / 3)

What is this?

Table of contents Created and updated by William Orellana on Mar 10, 2021

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B0272 Buick Description

Stepper motors are used for temperature regulation, air distribution control and recirculation door control. With the switches and dials on the HVAC controls, air temperature door position, mode door position and recirculation door position can be selected. The selected values are passed to the Heating, Ventilation, and Air Conditioning (HVAC) Control Module via serial data. The HVAC control module supplies a 12 V reference voltage to the stepper motors and energizes the 4 stepper motor coils with a pulsed ground signal. The stepper motors move the appropriate doors into the calculated positions, in order to reach the desired positions.

OBDII Code B0272 Buick - Air Flow Control 7 Circuit Open - AutoCodes.com — B0272 Buick Code - Air Flow Control 7 Circuit Open

What does this mean?

What are the Possible Causes of the DTC B0272 Buick?

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

How to Fix the DTC B0272 Buick?

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 B0272 Buick 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 B0272 Buick Code

1. What are the common symptoms of OBDII code B0272 in a Buick related to the Air Flow Control 7 Circuit Open?

- Common symptoms may include poor engine performance, rough idling, and potential stalling of the vehicle.

2. What are the possible causes of the OBDII code B0272 in a Buick indicating an Air Flow Control 7 Circuit Open?

- The code B0272 can be caused by a faulty air flow control actuator, damaged wiring or connectors, or an issue with the control module.

3. How can I diagnose the OBDII code B0272 in my Buick related to the Air Flow Control 7 Circuit Open?

- Diagnosing this code typically involves checking the wiring and connectors for any damage, testing the air flow control actuator, and using a scan tool to gather more information.

4. What are some repair tips for fixing the OBDII code B0272 Buick Air Flow Control 7 Circuit Open issue?

- Repair tips may include inspecting and repairing any damaged wiring, replacing the air flow control actuator if necessary, and resetting the fault codes after completing the repairs.

5. Is it safe to continue driving my Buick with the OBDII code B0272 indicating an Air Flow Control 7 Circuit Open?

- It is not recommended to drive your vehicle with this code present, as it can lead to further damage to the engine or other components if left unresolved.

6. Can I reset the OBDII code B0272 in my Buick related to the Air Flow Control 7 Circuit Open without making any repairs?

- While you can clear the code using a scan tool, it is important to address the underlying issue causing the code to prevent it from reoccurring.

7. How much does it typically cost to repair the OBDII code B0272 Buick Air Flow Control 7 Circuit Open problem?

- The cost of repairs can vary depending on the exact cause of the issue, but it may involve expenses for parts and labor at a repair shop.

8. Are there any preventative maintenance steps I can take to avoid encountering the OBDII code B0272 in my Buick?

- Regularly inspecting and maintaining the air flow control system, as well as keeping up with scheduled maintenance, can help prevent issues like the B0272 code from occurring.

9. Can a DIY enthusiast with some automotive knowledge fix the OBDII code B0272 Buick Air Flow Control 7 Circuit Open problem?

- Depending on your skill level and access to tools, you may be able to address this issue yourself by following diagnostic procedures and repair guides specific to your Buick model.

10. How long does it typically take to repair the OBDII code B0272 Buick Air Flow Control 7 Circuit Open issue?

- The repair time can vary based on the complexity of the problem and the availability of parts, but it may take a few hours to a full day to diagnose and fix the issue.