OBD Guide
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B1A09

Remote Keyless Entry Fob 2 Performance

B1A09 is an OBD-II diagnostic trouble code meaning: Remote Keyless Entry Fob 2 Performance. Common causes: low key fob battery, damage to the key fob. Estimated repair cost: $11–56.

Severity
✅ Low
Can you drive?
Yes, but get it checked soon
Approx. repair cost
$11–56 (est.)

Symptoms

  • The key fob does not respond to pressing
  • Reduced range of the key fob
  • Intermittent operation of key fob functions

Causes

  • Low key fob battery
  • Damage to the key fob
  • Interference from other electronic devices
  • Malfunction of the signal receiver in the car

How to Fix

  1. Check and replace the key fob battery
  2. Try reprogramming the key fob
  3. Check the functionality of other key fobs
  4. Diagnostics of the signal receiver in the car

FAQ

What does the B1A09 code mean?

B1A09 is an OBD-II diagnostic trouble code that indicates: Remote Keyless Entry Fob 2 Performance

What causes a B1A09 error code?

The most common causes of B1A09 include: Low key fob battery; Damage to the key fob; Interference from other electronic devices; Malfunction of the signal receiver in the car.

How do I fix a B1A09 diagnostic trouble code?

To fix B1A09: Check and replace the key fob battery. Try reprogramming the key fob. Check the functionality of other key fobs. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with B1A09?

Yes, but get it checked soon

How much does it cost to fix B1A09?

The estimated repair cost for B1A09 is $11–56. Actual cost depends on your vehicle, location, and labor rates.

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