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 DTC B1A0C Keyless key 5 fail DTC B1A0D Keyless key 6 fail DTC B1A0E Keyless key 7 fail DTC B1A0F Keyless key 8 fail: Notes

WARNING: This page is about a different car, the 2018 Mitsubishi Outlander. However, it is still accessible from the selected car via links, so may be relevant.

When replacing the ECU, always check that the communication circuit is normal.
When this diagnostic trouble code is set as "historic fault", clear it. Then, when the diagnostic trouble code is not set as "current fault" by operating the keyless entry system again, no action must be taken.