AutoCodes – Subaru – B2A07 Subaru

B2A07 Subaru Code - Backup Battery Charge System Performance

Quick Answer

The Diagnostic Trouble Code (DTC) sets when the Backup battery is disconnected for at least 5 seconds when the ignition switch is turned ON. Common causes include Faulty Backup Battery, Backup Battery harness is open or shorted, Backup Battery 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: B2A07 Subaru indicates Backup Battery Charge System Performance.
Common causes: Common causes include Faulty Backup Battery, Backup Battery harness is open or shorted, Backup Battery 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 3,823

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

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Table of contents Created and updated by William Orellana on Feb 27, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B2A07 Subaru Description

The Diagnostic Trouble Code (DTC) sets when the Backup battery is disconnected for at least 5 seconds when the ignition switch is turned ON. (Detached backup battery connection, etc.)

OBDII Code B2A07 Subaru - Backup Battery Charge System Performance - AutoCodes.com — B2A07 Subaru Code - Backup Battery Charge System Performance

What does this mean?

What are the Possible Causes of the DTC B2A07 Subaru?

Faulty Backup Battery
Backup Battery harness is open or shorted
Backup Battery circuit poor electrical connection
Faulty Data Communication Module (DCM)

How to Fix the DTC B2A07 Subaru?

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 B2A07 Subaru 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.

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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 B2A07 Subaru Code

1. What does the OBDII code B2A07 indicate on a Subaru?

- The code B2A07 indicates an issue with the backup battery charge system performance, suggesting that the system responsible for charging the backup battery is not functioning correctly.

2. What are common symptoms of the B2A07 code in a Subaru?

- Common symptoms include the battery warning light on the dashboard being illuminated, reduced vehicle electrical performance, and possible issues with starting the vehicle.

3. What causes the B2A07 code to appear in a Subaru?

- Possible causes for this code include a faulty backup battery, poor battery connections, a malfunctioning charging system, or a problem with the vehicleâ€™s electrical wiring.

4. How can I diagnose the B2A07 code in my Subaru?

- Diagnosing this code involves checking the backup batteryâ€™s condition and connections, testing the charging systemâ€™s output, and inspecting the related wiring for damage or disconnections.

5. What are the steps to fix the B2A07 code in a Subaru?

- To fix this code, replace the backup battery if it is faulty, repair or replace any damaged wiring or connectors, and ensure that the charging system is operating correctly.

6. Is it safe to drive my Subaru with the B2A07 code active?

- While it might be safe to drive for short distances, it is advisable to address the issue promptly to avoid potential breakdowns or further electrical system damage.

7. Can the B2A07 code affect the overall performance of my Subaru?

- Yes, this code can affect the overall performance by impacting the electrical systems of the vehicle, potentially leading to difficulties in starting the engine or failures of various electronic components.

8. What tools are needed to diagnose the B2A07 code on a Subaru?

- A multimeter for checking voltages and resistances, a battery tester, and an OBDII scanner capable of reading Subaru-specific codes are essential tools for diagnosing this issue.

9. How often do backup battery issues occur in Subarus leading to the B2A07 code?

- Backup battery issues are not exceedingly common but can occur due to aging batteries, severe climate conditions, or defects in the charging system components.