OBD Guide
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B1A3C

Internal Siren Battery

B1A3C is an OBD-II diagnostic trouble code meaning: Internal Siren Battery. Common causes: dead siren battery, damage to the siren power circuit. Estimated repair cost: $56–167.

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

Symptoms

  • Security light flashing
  • Siren does not work when trying to steal
  • False alarms

Causes

  • Dead siren battery
  • Damage to the siren power circuit
  • Malfunction of the siren itself

How to Fix

  1. Check the siren battery charge
  2. Replace the battery if necessary
  3. Check the siren power circuit
  4. Replace the siren if the battery cannot be replaced

FAQ

What does the B1A3C code mean?

B1A3C is an OBD-II diagnostic trouble code that indicates: Internal Siren Battery

What causes a B1A3C error code?

The most common causes of B1A3C include: Dead siren battery; Damage to the siren power circuit; Malfunction of the siren itself.

How do I fix a B1A3C diagnostic trouble code?

To fix B1A3C: Check the siren battery charge. Replace the battery if necessary. Check the siren power circuit. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with B1A3C?

Do not drive — repair immediately

How much does it cost to fix B1A3C?

The estimated repair cost for B1A3C is $56–167. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat