boatmoter

Hi all, have a 2011 malibu LT w/2.4, has code for cam actuators, keeps coming back after 10 -20 miles, replaced cam actuators with Delco, changed oil & filter with mobile one & delco filter. still pumps code for actuators. no effect on idle or performance,any ideas? also scanned with modis, found nothing,old actuators had no debris on the screens