hi all got a 1.7 dti astra van. warning light stays on. drove home took 1 hr stayed at 70/80 no problems/ loss of power, drove great. last owner had cam belt changed at 120000 now done 125000. been standing for 3/4 weeks. hand brake was stuck but now seems fine. pedal test revealed 0370 and 0571 faults any advise cheers