AutoCodes – Infiniti – B27A2 Infiniti

B27A2 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: B27A2 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 451

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 B27A2 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 1.

OBDII Code B27A2 Infiniti - Air Mix Door Motor - AutoCodes.com — B27A2 Infiniti Code - Air Mix Door Motor

What does this mean?

What are the Possible Causes of the DTC B27A2 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 B27A2 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 B27A2 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 B27A2 Infiniti code?

Need more information on how to fix the B27A2 Infiniti code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B27A2 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 B27A2 Infiniti Code

1. What are common symptoms of OBDII code B27A2 in an Infiniti related to the Air Mix Door Motor?

Common symptoms include inconsistent temperature control, unusual noises coming from the HVAC system, and the inability to adjust the cabin temperature properly.

2. What is the most common cause of OBDII code B27A2 in an Infiniti related to the Air Mix Door Motor?

The most common cause is a malfunctioning or faulty air mix door motor, which controls the blend of hot and cold air in the HVAC system.

3. How can I diagnose the issue related to OBDII code B27A2 in my Infiniti with the Air Mix Door Motor?

Diagnosis typically involves using a scan tool to retrieve the specific trouble code, as well as inspecting the air mix door motor and related components for any visible damage or malfunctions.

4. Can I still drive my Infiniti with OBDII code B27A2 related to the Air Mix Door Motor?

It is not recommended to drive your vehicle with this issue, as it can lead to discomfort due to improper temperature control and may cause further damage to the HVAC system.

5. What are some repair tips for fixing OBDII code B27A2 in an Infiniti related to the Air Mix Door Motor?

Repair tips may include replacing the air mix door motor, checking and repairing any damaged wiring or connectors, and ensuring proper calibration of the HVAC system after the repair.

6. Are there any DIY solutions for addressing OBDII code B27A2 in an Infiniti related to the Air Mix Door Motor?

While some basic troubleshooting steps can be taken, such as checking fuses and connections, it is recommended to consult a professional mechanic for a proper diagnosis and repair.

7. How much does it typically cost to repair OBDII code B27A2 in an Infiniti related to the Air Mix Door Motor?

The cost of repair can vary depending on the extent of the damage and the specific components that need to be replaced, but it may range from a few hundred to a few thousand dollars.

8. Can a malfunctioning air mix door motor cause other problems in my Infiniti besides OBDII code B27A2?

Yes, a malfunctioning air mix door motor can cause issues such as inconsistent airflow, reduced heating or cooling efficiency, and overall discomfort while driving.

9. How long does it usually take to repair OBDII code B27A2 in an Infiniti related to the Air Mix Door Motor?

The repair time can vary based on the complexity of the issue and the availability of replacement parts, but it typically takes a few hours to a full day to complete the repair.

10. Is it necessary to reset the OBDII system after repairing OBDII code B27A2 in an Infiniti related to the Air Mix Door Motor?

Yes, it is recommended to reset the OBDII system after completing the repair to clear the trouble code and ensure that the issue has been resolved successfully.