Hi, My name is Paul & I will try to assist you
The message "start error" on the dash is caused by the imobilisor not recognising the key.
In the first instance if you have a spare key then you should try this to see if the fault still exists with the other key
If it does then the fault is likely to be within the DAS (Driver Authorisation System) module - this will need to be confirmed with STAR diagnostic tool
If the DAS module requires replacing then it also needs coding on STAR before it will work
Let me know if you need anything else
Best regards, Paul