OBD Guide
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B2A07

Backup Battery Charge System Performance

B2A07 is an OBD-II diagnostic trouble code meaning: Backup Battery Charge System Performance. Common causes: low or faulty srs backup battery, open or short circuit in the charging circuit. Estimated repair cost: $56–167.

Severity
⚠️ Medium
Can you drive?
Do not drive — repair immediately
Approx. repair cost
$56–167 (est.)

Symptoms

  • Airbag light is on
  • Security error message on dashboard
  • Problems with the operation of airbags or pretensioners

Causes

  • Low or faulty SRS backup battery
  • Open or short circuit in the charging circuit
  • Corrosion of backup battery contacts
  • SRS control unit malfunction
  • Problems with the main battery or alternator

How to Fix

  1. Check the voltage of the main battery and generator
  2. Diagnose the status of the SRS backup battery
  3. Check the integrity of the wiring harness and contacts
  4. Scan the SRS control unit for additional errors
  5. If necessary, replace the backup battery or SRS control unit

Related codes

B2A00B2A01B1000

FAQ

What does the B2A07 code mean?

B2A07 is an OBD-II diagnostic trouble code that indicates: Backup Battery Charge System Performance

What causes a B2A07 error code?

The most common causes of B2A07 include: Low or faulty SRS backup battery; Open or short circuit in the charging circuit; Corrosion of backup battery contacts; SRS control unit malfunction.

How do I fix a B2A07 diagnostic trouble code?

To fix B2A07: Check the voltage of the main battery and generator. Diagnose the status of the SRS backup battery. Check the integrity of the wiring harness and contacts. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with B2A07?

Do not drive — repair immediately

How much does it cost to fix B2A07?

The estimated repair cost for B2A07 is $56–167. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat