OBD2 was compulsory in the US from 1996, but unfortunately in Europe manufacturers were allowed to each go their own way until 2001 when EOBD became mandatory for petrol engined cars. Some earlier European spec cars are compliant with OBD2 but many are not and it can be very hit and miss.
I had a similar issue with a 2000 Citroën that was built before EOBD and I ended up going for a £200 handheld scanner designed specifically for the make. For example this one is the equivalent, but for Toyotas :
https://www.gendan.co.uk/product_FXNT520T.html