AutoCodes – Generic – B24BB

B24BB Code - Left Air Mix Door Motor

Quick Answer

The Diagnostic Trouble Code (DTC) is set when A/C Auto Amplifier detects a short or open circuit of the Left Air Mix Door Motor drive signal. Common causes include Faulty Left Air Mix Door Motor, Left Air Mix Door Motor harness is open or shorted, Left Air Mix Door Motor 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: B24BB indicates Left Air Mix Door Motor.
Common causes: Common causes include Faulty Left Air Mix Door Motor, Left Air Mix Door Motor harness is open or shorted, Left Air Mix Door Motor 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 1,469

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 Dec 16, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B24BB Description

The Diagnostic Trouble Code (DTC) is set when A/C Auto Amplifier detects a short or open circuit of the Left Air Mix Door Motor drive signal.

OBDII Code B24BB - Left Air Mix Door Motor - AutoCodes.com — B24BB Code - Left Air Mix Door Motor

What does this mean?

What are the Possible Causes of the DTC B24BB?

Faulty Left Air Mix Door Motor
Left Air Mix Door Motor harness is open or shorted
Left Air Mix Door Motor circuit poor electrical connection
Faulty A/C Auto Amplifier

How to Fix the DTC B24BB?

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 B24BB 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 B24BB code?

Need more information on how to fix the B24BB code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B24BB code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

B24BB Infiniti — Left Air Mix Door Motor
B24BB Nissan — Left Air Mix Door Motor

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 B24BB Code

1. What are common symptoms of OBDII code B24BB (Left Air Mix Door Motor)?

The common symptoms include inconsistent temperature control on the driver's side, warm air blowing when cold air is selected, or vice versa.

2. What causes OBDII code B24BB to trigger in relation to the Left Air Mix Door Motor?

The code is typically triggered when the HVAC system detects a malfunction or failure in the left air mix door motor, which controls the blend of hot and cold air for the driver's side.

3. How can I diagnose the issue related to OBDII code B24BB?

You can diagnose the problem by checking the left air mix door motor for physical obstructions, testing the motor's functionality, and inspecting the wiring and connections for any damage.

4. What are some possible repair tips for resolving OBDII code B24BB?

Repair tips may include cleaning or replacing the left air mix door motor, ensuring proper calibration of the HVAC system, and resetting the fault code after making necessary repairs.

5. Can OBDII code B24BB be fixed without professional help?

While some DIY enthusiasts may be able to address the issue themselves, it is recommended to seek professional help, especially if the repair involves accessing hard-to-reach components or requires specialized tools.

6. Is it safe to continue driving with OBDII code B24BB active?

It is generally safe to drive with this code, but it is advisable to address the issue promptly to avoid discomfort due to inconsistent temperature control and prevent potential damage to other HVAC components.

7. How much does it typically cost to repair OBDII code B24BB (Left Air Mix Door Motor)?

The repair cost can vary depending on the extent of the issue, labor rates in your area, and whether you choose to replace the motor yourself or have it done by a professional technician.

8. Are there any preventive measures to avoid OBDII code B24BB from recurring?

Regular maintenance of the HVAC system, checking for any unusual noises or temperature fluctuations, and addressing minor issues promptly can help prevent the reoccurrence of this fault code.

9. What role does the Left Air Mix Door Motor play in the vehicle's HVAC system?

The Left Air Mix Door Motor controls the blend of hot and cold air specifically for the driver's side of the vehicle, allowing for temperature control and comfort customization.

10. Can weather conditions or external factors contribute to triggering OBDII code B24BB?

While external factors may not directly trigger this code, extreme temperature changes or prolonged exposure to harsh weather conditions can potentially accelerate wear and tear on the HVAC components, leading to issues like the Left Air Mix Door Motor malfunction.