VZ commodore issues, very low fuel, fuel gauge error contact dealer, ABS fault

Starting issues with VZ commodore wagon, has been ongoing for over 12mths but lately been every day almost, have had 2 auto electricians plug it in over the year but never played up. Booked in to dealer this coming week.
Entered dashboard functions mode while errors were appearing and came up with immobilizer Fail notice for the first time as i cycled through to see trouble codes. ABS error disappeared and car started.
Who knows, temporary fix. Will try again to confirm
dashboard function video
• Holden Commodore VX en...