B1A25
Invalid Key
B1A25 is an OBD-II diagnostic trouble code meaning: Invalid Key. Common causes: faulty chip in the key, problems with the immobilizer antenna. Estimated repair cost: $11–167.
Symptoms
- The car won't start
- The immobilizer indicator is flashing
- Message on the dashboard about an unrecognized key
Causes
- Faulty chip in the key
- Problems with the immobilizer antenna
- Immobilizer module malfunction
- Dead key battery or interference from electronic devices
How to Fix
- Check the battery in the key
- Try to start the car with a spare key
- Check the immobilizer antenna for damage
- Have the immobilizer diagnosed by a specialist
Related codes
FAQ
What does the B1A25 code mean?
B1A25 is an OBD-II diagnostic trouble code that indicates: Invalid Key
What causes a B1A25 error code?
The most common causes of B1A25 include: Faulty chip in the key; Problems with the immobilizer antenna; Immobilizer module malfunction; Dead key battery or interference from electronic devices.
How do I fix a B1A25 diagnostic trouble code?
To fix B1A25: Check the battery in the key. Try to start the car with a spare key. Check the immobilizer antenna for damage. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with B1A25?
Yes, but get it checked soon
How much does it cost to fix B1A25?
The estimated repair cost for B1A25 is $11–167. Actual cost depends on your vehicle, location, and labor rates.
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