OBD Guide
ENFRDEESPT

B1A3E

Siren/ITM Mismatch

B1A3E is an OBD-II diagnostic trouble code meaning: Siren/ITM Mismatch. Common causes: alarm siren malfunction, problems in the wiring harness. Estimated repair cost: $56–167.

Severity
⚠️ Medium
Can you drive?
Limited driving only, diagnose soon
Approx. repair cost
$56–167 (est.)

Symptoms

  • Alarm siren does not work
  • False alarms
  • Error message on the dashboard

Causes

  • Alarm siren malfunction
  • Problems in the wiring harness
  • Intelligent Transport Module (ITM) failure
  • Incorrect installation of security components

How to Fix

  1. Check the status of the alarm siren
  2. Inspect the wiring harness for damage
  3. Carry out ITM diagnostics
  4. Replace faulty components

Related codes

B1A3DB1A3F

FAQ

What does the B1A3E code mean?

B1A3E is an OBD-II diagnostic trouble code that indicates: Siren/ITM Mismatch

What causes a B1A3E error code?

The most common causes of B1A3E include: Alarm siren malfunction; Problems in the wiring harness; Intelligent Transport Module (ITM) failure; Incorrect installation of security components.

How do I fix a B1A3E diagnostic trouble code?

To fix B1A3E: Check the status of the alarm siren. Inspect the wiring harness for damage. Carry out ITM diagnostics. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with B1A3E?

Limited driving only, diagnose soon

How much does it cost to fix B1A3E?

The estimated repair cost for B1A3E is $56–167. Actual cost depends on your vehicle, location, and labor rates.

FRDEESPT

See also: Russian version · NationStat