Welcome to my world.

No idea on the instrument self-test codes, I never use/look at them -I will see if there's a chart for it.

Seems like you still have a fault on the can-bus to me.

Check the connectors I mentioned earlier. Particulary the angled one at base of NS A pillar and the one behind the sound insulation as these carry the hi-speed can wiring (red/blue trace and grey/red) - they're pathetic thin wires..