AutoCodes – Chevrolet – B0249 Chevrolet

B0249 Chevrolet Code - Air Flow Control 3 Circuit Range

Quick Answer

Stepper motors are used for temperature regulation, air distribution control and recirculation door control. Common causes include Faulty Mode Actuator, Mode Actuator harness is open or shorted, Mode 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: B0249 Chevrolet indicates Air Flow Control 3 Circuit Range.
Common causes: Common causes include Faulty Mode Actuator, Mode Actuator harness is open or shorted, Mode 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 1,499

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 B0249 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 B0249 Chevrolet - Air Flow Control 3 Circuit Range - AutoCodes.com — B0249 Chevrolet Code - Air Flow Control 3 Circuit Range

What does this mean?

What are the Possible Causes of the DTC B0249 Chevrolet?

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

How to Fix the DTC B0249 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 B0249 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 Help with the Code?

Get the B0249 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 B0249 Chevrolet Code

1. What are the common symptoms of OBDII code B0249 Chevrolet (Air Flow Control 3 Circuit Range)?

- Common symptoms include rough idling, engine stalling, decreased fuel efficiency, and illuminated check engine light.

2. What are the possible causes of OBDII code B0249 Chevrolet?

- Possible causes may include a faulty air flow control actuator, damaged wiring or connectors, or issues with the air flow control circuit.

3. How can I diagnose the OBDII code B0249 Chevrolet?

- Diagnosis involves using a scan tool to read the code, checking the air flow control system components for any visible damage, and performing electrical tests on the circuit.

4. Is it safe to continue driving with OBDII code B0249 Chevrolet present?

- It is not recommended to continue driving with this code as it can lead to further damage to the engine or emissions system.

5. How can I repair OBDII code B0249 Chevrolet?

- Repair options include replacing the air flow control actuator, repairing or replacing damaged wiring or connectors, and clearing the code with a scan tool.

6. Can a DIY enthusiast fix OBDII code B0249 Chevrolet?

- Depending on your skill level and access to tools, some DIY enthusiasts may be able to diagnose and repair this code. However, professional assistance is recommended for accurate diagnosis and proper repair.

7. Will resetting the check engine light make OBDII code B0249 Chevrolet disappear?

- Resetting the check engine light may temporarily turn it off, but the underlying issue causing the code will still need to be diagnosed and repaired to prevent it from reappearing.

8. How long does it typically take to repair OBDII code B0249 Chevrolet?

- The repair time can vary based on the exact cause of the code and the availability of parts, but it may take anywhere from a few hours to a full day to complete the repair.

9. Are there any preventative measures to avoid OBDII code B0249 Chevrolet in the future?

- Regular maintenance of the air flow control system, such as cleaning sensors and connectors, can help prevent issues that may trigger this code.

10. Is OBDII code B0249 Chevrolet a serious issue that requires immediate attention?

- While the severity of the issue may vary, it is generally recommended to address this code promptly to prevent potential engine performance issues and further damage.