B3976
Unconfigured Transponder
B3976 is an OBD-II diagnostic trouble code meaning: Unconfigured Transponder. Common causes: faulty or unprogrammed transponder in the key, damage to the immobilizer antenna. Estimated repair cost: $56–167.
Symptoms
- Engine won't start
- The immobilizer indicator is flashing
- Security system blocks ignition
Causes
- Faulty or unprogrammed transponder in the key
- Damage to the immobilizer antenna
- Failure in immobilizer programming
- Problems with the immobilizer wiring harness
How to Fix
- Check the key for damage
- Reprogram the transponder using diagnostic equipment
- Check the immobilizer antenna and its connection
- Replace the key or transponder if necessary
Related codes
Error B3976 by Vehicle Brand
FAQ
What does the B3976 code mean?
B3976 is an OBD-II diagnostic trouble code that indicates: Unconfigured Transponder
What causes a B3976 error code?
The most common causes of B3976 include: Faulty or unprogrammed transponder in the key; Damage to the immobilizer antenna; Failure in immobilizer programming; Problems with the immobilizer wiring harness.
How do I fix a B3976 diagnostic trouble code?
To fix B3976: Check the key for damage. Reprogram the transponder using diagnostic equipment. Check the immobilizer antenna and its connection. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with B3976?
Yes, but get it checked soon
How much does it cost to fix B3976?
The estimated repair cost for B3976 is $56–167. Actual cost depends on your vehicle, location, and labor rates.
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