Their appears to be two issues with cams
1. Minor manufacturing tollerance issue where ecu detects slight abnormality in cam actuator duty cycle, this can be fixed with ECU firmware update to relax tolerances.
2. More nasty one is actual mechanical problem or failure with oil control valves or cam sprocket issue as below, the highlighted part should be flush , this type of fault bleeds off oil pressure causing cam to malfunction and it appears bleeds off oil pressure to other parts of engine which may cause engine failure
see post here for full description
http://www.ft86club.com/forums/showthread.php?p=1794934
it should look like
