B3976

Unconfigured Transponder

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
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

B3975 B3977 P0513