my o2 a4 didn't start one morning. i thought it could be an alternator but once i put the battery charger on the radiator fans came on with no keys in. finally got it to start but you hit the peddle and the throttle wouldn't rev at all. it finally died. i had a buddy get the codes and it read a p1296 & P0688p. don't know what they are. now the car just cranks. anyone know any reasons
thanks