OBD Guide
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B1A26

Maximum Number Of Keys Programmed

B1A26 is an OBD-II diagnostic trouble code meaning: Maximum Number Of Keys Programmed. Common causes: attempting to add a new key when the limit has been reached, immobilizer software failure. Estimated repair cost: $56–167.

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

Symptoms

  • Inability to program a new key
  • Message on the dashboard about exceeding the key limit
  • Keyless entry system failure (if equipped)

Causes

  • Attempting to add a new key when the limit has been reached
  • Immobilizer software failure
  • Damage to the immobilizer control unit

How to Fix

  1. Diagnostics of the immobilizer system
  2. Removing old keys from system memory
  3. Programming new keys
  4. Immobilizer software update (if necessary)

Related codes

B1A25B1A27B1A28

FAQ

What does the B1A26 code mean?

B1A26 is an OBD-II diagnostic trouble code that indicates: Maximum Number Of Keys Programmed

What causes a B1A26 error code?

The most common causes of B1A26 include: Attempting to add a new key when the limit has been reached; Immobilizer software failure; Damage to the immobilizer control unit.

How do I fix a B1A26 diagnostic trouble code?

To fix B1A26: Diagnostics of the immobilizer system. Removing old keys from system memory. Programming new keys. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with B1A26?

Yes, but get it checked soon

How much does it cost to fix B1A26?

The estimated repair cost for B1A26 is $56–167. Actual cost depends on your vehicle, location, and labor rates.

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