What does code B2798 mean on Lexus vehicles?
A secondary communication fault has been detected within the immobilizer system network.
OBD-II Code Lexus
B2798 — Lexus — Communication Malfunction No. 2 (Immobilizer System)
A secondary communication fault has been detected within the immobilizer system network.
Common symptoms
- No start condition
Possible causes
- Immobilizer module failure
- CAN bus communication issue
Initial recommendation
Diagnose CAN bus and immobilizer communication circuits.
Safety notice
This information is for guidance only. Brand-specific codes may vary by model, year, engine, transmission and vehicle configuration. It does not replace a physical inspection or diagnosis by a qualified mechanic. If the vehicle is unsafe to operate, avoid driving it and seek professional inspection.
Analyze this code with MecaOBD
Use the app to combine Lexus code B2798 with your vehicle's actual symptoms for more complete diagnostic guidance.
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