One possibility is that it is trying to do a DPF regen, or is in need of one.
Is yours the 1.4 or 1.6? If 1.6 is it the 90PS or 95PS version?
How could i find out if a 12 reg 1.4 TDCi titanium has a DPF or not?
My other half has had her car nearly a year, used to display 54 ish mpg average now with sometimes going up to 68 mpg and regularly once getting 61 mpg, and she is a lively driver. But it has steadily got worse!! Barely doing 45 to 47 mpg now and she just sits on cruise doing 65, and now only getting 370 miles to a tank if she is lucky.
It is due a service as its just clocked 1 yr old, and wondered if it could be that or this DPF, have said maybe she should mention it to the techy at the service centre but worried she might get the run around and do stuff costing god knows what for no results....
Any advice appreciated..