AutoCodes – Generic – B0272

B0272 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 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 1,009

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

What does this mean?

What are the Possible Causes of the DTC B0272?

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?

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 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 B0272 code?

Need more information on how to fix the B0272 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B0272 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

B0272 Buick — Air Flow Control 7 Circuit Open
B0272 Cadillac — Air Flow Control 7 Circuit Open
B0272 Chevrolet — Air Flow Control 7 Circuit Open
B0272 GMC — Air Flow Control 7 Circuit Open
B0272 Pontiac — Air Flow Control 7 Circuit Open
B0272 Saturn — Air Flow Control 7 Circuit Open

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 Code

1. What are the common symptoms of OBDII code B0272 (Air Flow Control 7 Circuit Open)?

- Common symptoms include poor engine performance, reduced fuel efficiency, and potential stalling or rough idling.

2. What are the possible causes of OBDII code B0272?

- Causes may include damaged wiring or connectors, a faulty air flow control module, or a malfunctioning sensor.

3. How can I diagnose the issue related to OBDII code B0272?

- Use a code reader to retrieve the specific details of the code, inspect the wiring and connectors for any visible damage, and test the air flow control module and sensor for proper functionality.

4. Can I still drive my vehicle with OBDII code B0272 present?

- It is not recommended to drive your vehicle with this code present, as it can lead to further damage and potential safety hazards.

5. How can I repair OBDII code B0272 (Air Flow Control 7 Circuit Open)?

- Repair options may include repairing or replacing damaged wiring, connectors, the air flow control module, or the sensor as needed.

6. Is it possible to clear OBDII code B0272 without fixing the underlying issue?

- Clearing the code without addressing the root cause is not recommended, as the issue will likely reappear and could lead to more serious problems.

7. Can a DIY enthusiast fix OBDII code B0272 at home?

- Depending on your skill level and access to tools, some DIY enthusiasts may be able to address this code at home by following repair guides and using proper diagnostic equipment.

8. How much does it typically cost to repair OBDII code B0272 at a mechanic or dealership?

- The cost of repair can vary based on the specific cause of the issue, but it may range from a few hundred to over a thousand dollars, including parts and labor.

9. Are there any preventive maintenance tips to avoid OBDII code B0272 in the future?

- Regularly inspecting and maintaining your vehicle's electrical system, including wiring and connectors, can help prevent issues that may trigger this code.

10. Can OBDII code B0272 cause damage to other components if left unfixed?

- Yes, if left unfixed, OBDII code B0272 can potentially cause damage to other engine components and lead to more extensive and costly repairs in the future.