DTC B1A08: Keyless/F.A.S.T. key 1 fail; DTC B1A09: Keyless/F.A.S.T. key 2 fail; DTC B1A0A: Keyless/F.A.S.T. key 3 fail; DTC B1A0B: Keyless/F.A.S.T. key 4 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:
When replacing the ECU, always check that the communication circuit is normal.