What causes B1402 on a Toyota?

Key not registered in the main body ECU Failed transponder key chip Failed main body ECU Damaged key or immobiliser wiring Low system voltage

How do I fix B1402 on a Toyota?

Confirm the code and read freeze frame data Check battery voltage and the charging system Retry with a known good registered key Inspect and reseat the immobiliser connectors Repair the key registration or replace the failed module after tests fail

B1402 Immobiliser key check failed

Q: What does B1402 mean on a Toyota?

B1402. Immobiliser key check failed. A key not registered in the main body ECU was used. Applies to Toyota, Lexus and Scion models that use this code.

Category: Body
Severity: Body Warning Light
Applies to: Toyota, Lexus and Scion models that use this code

What does B1402 mean on a Toyota?

B1402. Immobiliser key check failed. A key not registered in the main body ECU was used. This Toyota-enhanced code applies to Toyota, Lexus and Scion models that use this code.

Common causes of B1402

Key not registered in the main body ECU
Failed transponder key chip
Failed main body ECU
Damaged key or immobiliser wiring
Low system voltage

How to fix B1402

Confirm the code and read freeze frame data
Check battery voltage and the charging system
Retry with a known good registered key
Inspect and reseat the immobiliser connectors
Repair the key registration or replace the failed module after tests fail