I have an 07 TDVi with 72K on the clock. The restricted performance warning comes on if I drive 10 - 12 local miles from cold and then accelerate on to a dual carriageway. It doesn't happen if I go 15 - 20 miles on local roads then get up to speed. My local Jaguar Dealer has had the car on an analyser and as a result replaced a faulty turbo and then the port de-activation valve. neither has had any effect. The DPF is clean and not a problem they say.


Anyone have any ideas please