What causes B2798 on a Toyota?

Open or short on the immobilizer bus Faulty immobilizer component Corroded connector Failed certification ECU Low system voltage

How do I fix B2798 on a Toyota?

Confirm the code with a scan tool Inspect and reseat the immobilizer connectors Test the communication line for opens and shorts Check component power and ground Replace a component only after tests fail

B2798 Communication malfunction number two in the immobilizer system

Q: What does B2798 mean on a Toyota?

B2798. Communication malfunction number two in the immobilizer system. A second component on the immobilizer bus stops answering the certification ECU. 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 B2798 mean on a Toyota?

B2798. Communication malfunction number two in the immobilizer system. A second component on the immobilizer bus stops answering the certification ECU. This Toyota-enhanced code applies to Toyota, Lexus and Scion models that use this code.

Common causes of B2798

Open or short on the immobilizer bus
Faulty immobilizer component
Corroded connector
Failed certification ECU
Low system voltage

How to fix B2798

Confirm the code with a scan tool
Inspect and reseat the immobilizer connectors
Test the communication line for opens and shorts
Check component power and ground
Replace a component only after tests fail