Hello all. Hoping for a few ideas on this one. The engine light is always on but on starting , it drives fine with full power for about 5 miles, then into limp mode, about half power. Then after stopping even for just a minute and setting off again the power is back but again , just for 5 miles and back into limp mode. Has been force regenerated a couple of times which seems to work for a few thousand miles, then back to this. Hope you have some ideas. Many thanks.