D800 E10 Error code

invalid@example.com (Trevor /chedder), Trevor /chedder
Fri, 09 Aug 2024 18:21:24 +0000

Well i did it - and accidently lit the air bag light when replacing my seats. I have the D800 tool but its only showing error 10 - no/limited connection to the car (1.9 1998)
Yet to try disconnecting the battery- but does anyone have any other ideas?

FYI i have used the tool before successfully and all my engine bay fuses look ok
Thanks