B3902
Incorrect Immobilizer Identifier Received
B3902 is an OBD-II diagnostic trouble code meaning: Incorrect Immobilizer Identifier Received. Common causes: faulty ignition key, problems with the immobilizer antenna. Estimated repair cost: $56–167.
Symptoms
- Engine won't start
- The immobilizer indicator is flashing
- Check Engine light comes on
Causes
- Faulty ignition key
- Problems with the immobilizer antenna
- Malfunction of the immobilizer control unit
- Wiring harness damage
- ECU software failure
How to Fix
- Check if the ignition key is working properly
- Diagnose the immobilizer antenna
- Check the integrity of the wiring harness
- Reprogram ECU or immobilizer
- Replace faulty components
Related codes
Error B3902 by Vehicle Brand
FAQ
What does the B3902 code mean?
B3902 is an OBD-II diagnostic trouble code that indicates: Incorrect Immobilizer Identifier Received
What causes a B3902 error code?
The most common causes of B3902 include: Faulty ignition key; Problems with the immobilizer antenna; Malfunction of the immobilizer control unit; Wiring harness damage.
How do I fix a B3902 diagnostic trouble code?
To fix B3902: Check if the ignition key is working properly. Diagnose the immobilizer antenna. Check the integrity of the wiring harness. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with B3902?
Yes, but get it checked soon
How much does it cost to fix B3902?
The estimated repair cost for B3902 is $56–167. Actual cost depends on your vehicle, location, and labor rates.
See also: Russian version · NationStat