AutoCodes – Generic – B24B7

B24B7 Code - Intake Door Motor

Quick Answer

The Diagnostic Trouble Code (DTC) is set when A/C Auto Amplifier detects a short or open circuit of the Intake Door Motor drive signal. Common causes include Faulty Intake Door Motor, Intake Door Motor harness is open or shorted, Intake 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: B24B7 indicates Intake Door Motor.
Common causes: Common causes include Faulty Intake Door Motor, Intake Door Motor harness is open or shorted, Intake 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 1,857

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 B24B7 Description

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

OBDII Code B24B7 - Intake Door Motor - AutoCodes.com — B24B7 Code - Intake Door Motor

What does this mean?

What are the Possible Causes of the DTC B24B7?

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

How to Fix the DTC B24B7?

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 B24B7 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 B24B7 code?

Need more information on how to fix the B24B7 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B24B7 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

B24B7 Infiniti — Intake Door Motor
B24B7 Nissan — Intake 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 B24B7 Code

1. What does the OBDII code B24B7 mean?

The B24B7 code refers to a fault with the intake door motor, which controls the airflow direction in the vehicle's HVAC system.

2. What are the common symptoms of code B24B7?

Common symptoms include irregular airflow from vents, inability to adjust airflow direction, or unusual noises from the HVAC system.

3. What causes the B24B7 code to appear?

The code can be triggered by a faulty intake door motor, wiring issues, a stuck intake door, or a malfunction in the HVAC control module.

4. Can I still drive my car with the B24B7 code?

Yes, you can drive with this code, but the HVAC system may not function properly, leading to discomfort during extreme temperatures.

5. How do I diagnose the B24B7 code?

Start by checking for physical obstructions in the intake door, inspecting the motor and its electrical connections, and testing the HVAC control module.

6. How is the B24B7 code fixed?

Repairs may involve replacing the intake door motor, repairing damaged wiring, or recalibrating the HVAC system.

7. How much does it cost to fix the B24B7 code?

The cost varies depending on the vehicle and labor rates but typically ranges from $150 to $400 for parts and labor.

8. Can I fix the B24B7 code myself?

If you have experience with automotive repairs, you can inspect and replace the intake door motor or address wiring issues yourself. Otherwise, professional assistance is recommended.

9. Does clearing the B24B7 code solve the problem?

Clearing the code may temporarily reset the system, but the underlying issue must be repaired to prevent the code from returning.

10. Can a software update fix the B24B7 code?

In rare cases, a software update to the HVAC control module might resolve the issue, but this usually requires diagnosis by a dealership or qualified technician.