Hello, i bought a 98 Xantia 1.9 TD Auto with 193k on the clock, the car runs fine BUT theres an annoying problem which creeps up alot when the car is cold or traveling 60mph +.
The car would jerk a lil bit, and the Sports and Snow lights would flash. At the same instance, the car revs go up and goes really slow. Its almost as its going in a "limp mode". usually to ressolve this problem, i turn the ignition off and then back on but is there a permenent fix?
has anyone ever had this problem? What did they do to fix it?

Ive seen an Auto electricion, who ran tests through a computer, he didnt find anything.

Thanks for your help!