Lane A Light Steady - Injector Error

Had a Lane B (FADEC) light on downwind. (912IS, Sirius TL-3000). Still on after landing. Re started the engine at the hangar. No light. Next day, flew about an hour with stud. Another lane B light on our final pattern.  Cleared after shutdown & ground restart. 4 flights later, no more lights.

Don’t know why.

FIXED - After substituting the ECU, Fuse Box, Injectors and Plug Caps - It turned out to be a faulty Ignition Module. Physically the module looks OK, no swelling or heat damage. Even the Resistance values measure OK. Thanks for all the advice, I hope my findings helps others.