AutoCodes – Generic – B27A2

B27A2 Code - Open In Front Passenger Side Electrical Antenna Circuit

Quick Answer

The Certification ECU (Smart Key ECU Assembly) generates a request signal and sends it to the door electrical key oscillator built into the Front Passenger Door Outside Handle Assembly at 0.25-second intervals. Common causes include Faulty Front Passenger Door Outside Handle Assembly, Front Passenger Door Outside Handle Assembly harness is open or shorted, Front Passenger Door Outside Handle Assembly 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 indicates Open In Front Passenger Side Electrical Antenna Circuit.
Common causes: Common causes include Faulty Front Passenger Door Outside Handle Assembly, Front Passenger Door Outside Handle Assembly harness is open or shorted, Front Passenger Door Outside Handle Assembly 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 4,716

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 Jan 18, 2023

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B27A2 Description

The Certification ECU (Smart Key ECU Assembly) generates a request signal and sends it to the door electrical key oscillator built into the Front Passenger Door Outside Handle Assembly at 0.25-second intervals. To detect a key near the front passenger door, the Front Passenger Door Outside Handle Assembly creates a detection area with a radius of approximately 1.0 m (3.28 ft.) from the front passenger door at 0.25-second intervals.
The Diagnostic Trouble Code (DTC) B27A2 is detected by the Certification ECU (Smart Key ECU Assembly) if an open circuit is detected between the Certification ECU (Smart Key ECU Assembly) and Front Passenger Door Outside Handle Assembly terminals.

OBDII Code B27A2 - Open In Front Passenger Side Electrical Antenna Circuit - AutoCodes.com — B27A2 Code - Open In Front Passenger Side Electrical Antenna Circuit

What does this mean?

What are the Possible Causes of the DTC B27A2?

Faulty Front Passenger Door Outside Handle Assembly
Front Passenger Door Outside Handle Assembly harness is open or shorted
Front Passenger Door Outside Handle Assembly circuit poor electrical connection
Faulty Certification ECU (Smart Key ECU Assembly)

How to Fix the DTC B27A2?

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 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 code?

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

Need Help with the Code?

Get the B27A2 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

B27A2 Infiniti — Air Mix Door Motor
B27A2 Lexus — Open In Front Passenger Side Electrical Antenna Circuit
B27A2 Nissan — Air Mix Door Motor
B27A2 Scion — Open In Front Passenger Side Electrical Antenna Circuit
B27A2 Toyota — Open In Front Passenger Side Electrical Antenna Circuit

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 Code

1. What does the OBDII code B27A2 mean?

B27A2 indicates an open circuit in the front passenger side electrical antenna, meaning there is a break or disconnection in the antenna's wiring or components.

2. What are the common symptoms of the B27A2 code?

Symptoms may include poor radio reception, inability to tune into certain frequencies, or no radio signal at all.

3. What causes the B27A2 code to appear?

Common causes include damaged or corroded wiring, a faulty antenna base, a broken antenna mast, or a malfunctioning antenna control module.

4. How can I diagnose the B27A2 code?

Start by inspecting the antenna wiring for visible damage, test the continuity of the circuit with a multimeter, and check the antenna control module for proper operation.

5. Can I still drive my car with the B27A2 code?

Yes, this code does not affect vehicle drivability, but it may impair radio functionality and overall listening experience.

6. How do I fix the B27A2 code?

Repairs may include replacing damaged wiring, fixing loose connections, replacing the antenna base or mast, or repairing/replacing the antenna control module.

7. How much does it cost to fix the B27A2 code?

Repair costs vary depending on the issue, but fixing wiring or antenna components typically costs between $50 and $300, depending on labor and parts.

8. Can I clear the B27A2 code without fixing the problem?

Clearing the code without addressing the issue may temporarily remove the warning, but the code will likely return if the underlying problem is not resolved.

9. Is the B27A2 code specific to certain car brands?

While B27A2 is a generic OBDII code, its exact meaning and repair process may vary slightly depending on the vehicle manufacturer. Always refer to your vehicle's specific repair manual.

10. Will replacing the antenna fix the B27A2 code?

Replacing the antenna may resolve the issue if the antenna itself is faulty, but itâ€™s essential to first diagnose whether the problem lies in the wiring or control module.