B2796 No communication in the immobilizer system
What does B2796 mean on a Toyota?
B2796. No communication in the immobilizer system. The certification ECU cannot talk to the engine immobilizer components. This Toyota-enhanced code applies to Toyota, Lexus and Scion models that use this code.
Common causes of B2796
- Open or short on the immobilizer bus
- Faulty immobilizer component
- Corroded connector
- Failed certification ECU
- Low system voltage
How to fix B2796
- 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