ANY ONE COME ACROSS THIS, FAULT CODE PO346 CAM SENSOR A BANK 2 RANGE/PERFORMANCE/PROBLEM I HAVE CHANGED BOTH CAM SENSORS BUT THE CODE COMES BACK AFTER 3 MILES,SOMEONE SUGGESTED VALVE TIMING OUT THE CAR HAS ONLY DONE 30K AND RUNS FINE DO THEY SUFFER WITH CHAIN FAULTS CANT REALLY SEE WHAT ELSE IT CAN BE ANY IDEAS THANKS JOHN