OBD Guide
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B15CC

Backup Battery Failure

B15CC is an OBD-II diagnostic trouble code meaning: Backup Battery Failure. Common causes: the backup battery is low or faulty, damage to the wiring harness to the battery. Estimated repair cost: $33–111.

Severity
🔴 High
Can you drive?
Do not drive — repair immediately
Approx. repair cost
$33–111 (est.)

Symptoms

  • Airbag light is on
  • Error B15CC in fault memory
  • Reduced reliability of the passive safety system

Causes

  • The backup battery is low or faulty
  • Damage to the wiring harness to the battery
  • Contact corrosion
  • SRS control unit malfunction

How to Fix

  1. Check backup battery voltage
  2. Inspect the wiring harness and contacts for damage
  3. If necessary, replace the backup battery
  4. Reset the error and check the system

Related codes

B15CDB15CEB1015

FAQ

What does the B15CC code mean?

B15CC is an OBD-II diagnostic trouble code that indicates: Backup Battery Failure

What causes a B15CC error code?

The most common causes of B15CC include: The backup battery is low or faulty; Damage to the wiring harness to the battery; Contact corrosion; SRS control unit malfunction.

How do I fix a B15CC diagnostic trouble code?

To fix B15CC: Check backup battery voltage. Inspect the wiring harness and contacts for damage. If necessary, replace the backup battery. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with B15CC?

Do not drive — repair immediately

How much does it cost to fix B15CC?

The estimated repair cost for B15CC is $33–111. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat