AutoCodes – Chevrolet – B0272 Chevrolet

B0272 Chevrolet 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 Chevrolet 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 1,005

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

What does this mean?

What are the Possible Causes of the DTC B0272 Chevrolet?

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 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 B0272 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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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 Chevrolet Code

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

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

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

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

3. How can I diagnose the issue causing OBDII code B0272 in my Chevrolet?

- You can diagnose the issue by using a diagnostic scanner to read the code, checking the air flow control module and sensor, and inspecting the wiring for any damage.

4. Can a dirty air filter cause OBDII code B0272 to appear in a Chevrolet?

- While a dirty air filter can affect engine performance, it is not typically a direct cause of the Air Flow Control 7 Circuit Open code.

5. Is it safe to continue driving my Chevrolet with OBDII code B0272 present?

- It is not recommended to drive your vehicle with this code present, as it can lead to further engine damage and decreased performance.

6. How can I repair OBDII code B0272 related to Air Flow Control 7 Circuit Open in my Chevrolet?

- Repair options include replacing the air flow control module, repairing or replacing damaged wiring, and ensuring the air flow sensor is functioning properly.

7. Can I reset the OBDII code B0272 in my Chevrolet by disconnecting the battery?

- Disconnecting the battery may clear the code temporarily, but it is important to address the underlying issue to prevent the code from reappearing.

8. Will OBDII code B0272 cause my Chevrolet to fail an emissions test?

- Yes, this code may cause your vehicle to fail an emissions test due to its impact on engine performance and emissions control systems.

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

- Repair costs can vary depending on the specific issue, but it is recommended to budget for diagnostic fees, parts replacement, and labor costs.

10. Are there any preventive maintenance steps I can take to avoid OBDII code B0272 in my Chevrolet?

- Regularly inspecting and maintaining the air flow control system, including the sensor and module, can help prevent issues that may trigger this code.