AutoCodes – Infiniti – B27A5 Infiniti

B27A5 Infiniti Code - Air Mix Door Motor

Quick Answer

A/C Auto Amplifier operates intake door motor according to the target value of the Potentiometer Balance Resister (PBR). Common causes include Faulty Air Mix Door Motor, Air Mix Door Motor harness is open or shorted, 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: B27A5 Infiniti indicates Air Mix Door Motor.
Common causes: Common causes include Faulty Air Mix Door Motor, Air Mix Door Motor harness is open or shorted, 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 546

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 Feb 06, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B27A5 Infiniti Description

A/C Auto Amplifier operates intake door motor according to the target value of the Potentiometer Balance Resister (PBR). The Diagnostic Trouble Code (DTC) when the A/C Auto Amplifier detects a short or open circuit of air mix door motor drive signal terminal 3.

OBDII Code B27A5 Infiniti - Air Mix Door Motor - AutoCodes.com — B27A5 Infiniti Code - Air Mix Door Motor

What does this mean?

What are the Possible Causes of the DTC B27A5 Infiniti?

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

How to Fix the DTC B27A5 Infiniti?

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 B27A5 Infiniti 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 B27A5 Infiniti code?

Need more information on how to fix the B27A5 Infiniti code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B27A5 Infiniti 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 B27A5 Infiniti Code

1. What are the common symptoms of an OBDII code B27A5 related to the Air Mix Door Motor in an Infiniti?

- Common symptoms include inconsistent cabin temperature, lack of airflow from the vents, or the inability to adjust the temperature settings.

2. What could be causing the OBDII code B27A5 related to the Air Mix Door Motor in an Infiniti?

- The code B27A5 may be triggered by a faulty air mix door motor, a broken blend door, electrical issues, or a malfunctioning HVAC control unit.

3. How can I diagnose the issue causing the OBDII code B27A5 related to the Air Mix Door Motor in my Infiniti?

- Diagnosing the issue usually involves inspecting the air mix door motor, checking for any obstructions in the HVAC system, and using a scan tool to retrieve detailed diagnostic information.

4. Can I continue driving my Infiniti with the OBDII code B27A5 related to the Air Mix Door Motor?

- While it may be possible to drive the vehicle with this code, it is recommended to address the issue promptly to ensure proper HVAC functionality and comfort.

5. What are some repair tips for fixing the OBDII code B27A5 related to the Air Mix Door Motor in an Infiniti?

- Repair tips may include replacing the air mix door motor, repairing or replacing the blend door, checking and repairing any wiring or electrical connections, and recalibrating the HVAC system.

6. How much does it typically cost to repair the OBDII code B27A5 related to the Air Mix Door Motor in an Infiniti?

- Repair costs can vary depending on the specific issue, parts needed, and labor rates, but it is advisable to consult a professional technician for an accurate estimate.

7. Is the OBDII code B27A5 related to the Air Mix Door Motor a common issue in Infiniti vehicles?

- The occurrence of this specific code may vary among Infiniti models and production years, but issues with air mix door motors are not uncommon in HVAC systems.

8. Can I reset the OBDII code B27A5 related to the Air Mix Door Motor in my Infiniti without addressing the underlying issue?

- While you can clear the code using a scan tool, it is essential to address the root cause to prevent the problem from recurring and ensure proper HVAC function.

9. Are there any preventive measures I can take to avoid encountering the OBDII code B27A5 related to the Air Mix Door Motor in my Infiniti?

- Regular maintenance of the HVAC system, prompt attention to any temperature control issues, and addressing unusual HVAC system noises can help prevent this code from appearing.

10. How long does it typically take to repair the OBDII code B27A5 related to the Air Mix Door Motor in an Infiniti?

- The repair time can vary depending on the complexity of the issue, availability of parts, and the technician's experience, but it may range from a few hours to a full day in some cases.