thanks everyone. i’m in france…
i only take it to fiat because the slightly more generic code readers that non-fiat garages have, have not been able to read the fault in enough depth to know what actually needs done in the past.
eg last time the peugeot garage, with their pro level bosch machine, could tell me there was a problem with the particulate filter, but not what needed changed. only at fiat garage could they tell me it was the pump in the Celine (in english? – the liquid which gets burned to clean the filter) tank which was knackered.
but yes on relflection i think i’ll take it to a place i trust for most stuff, and see what their reader says.