OBD Guide
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B1A24

Key Not Programmed

B1A24 is an OBD-II diagnostic trouble code meaning: Key Not Programmed. Common causes: key not programmed, immobilizer malfunction. Estimated repair cost: $56–167.

Severity
🔴 High
Can you drive?
Yes, but get it checked soon
Approx. repair cost
$56–167 (est.)

Symptoms

  • The car won't start
  • The immobilizer indicator is flashing
  • The engine stalls immediately after starting

Causes

  • Key not programmed
  • Immobilizer malfunction
  • Damage to the security system wiring harness
  • Failure in the immobilizer control module

How to Fix

  1. Check the key for compatibility with the car
  2. Key programming using diagnostic equipment
  3. Check immobilizer wiring harness and connections
  4. Diagnostics and replacement of the immobilizer control module if necessary

Related codes

B1A23B1A25P0513

FAQ

What does the B1A24 code mean?

B1A24 is an OBD-II diagnostic trouble code that indicates: Key Not Programmed

What causes a B1A24 error code?

The most common causes of B1A24 include: Key not programmed; Immobilizer malfunction; Damage to the security system wiring harness; Failure in the immobilizer control module.

How do I fix a B1A24 diagnostic trouble code?

To fix B1A24: Check the key for compatibility with the car. Key programming using diagnostic equipment. Check immobilizer wiring harness and connections. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with B1A24?

Yes, but get it checked soon

How much does it cost to fix B1A24?

The estimated repair cost for B1A24 is $56–167. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat