B3902

Incorrect Immobilizer Identifier Received

Severity

🔴 High

Can you drive?

Yes, but get it checked soon

Approx. repair cost

$56–167 (est.)

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

B3901 B3903 P0513