DTC B2400: F.A.S.T. key registration fail: Notes
WARNING: This page is about a different car, the 2014 Mitsubishi Outlander. However, it is still accessible from the selected car via links, so may be relevant.
CAUTION:
- If the DTC B2400 is stored, diagnose the CAN bus lines.
- When replacing the ECU, always check that the communication circuit is normal.