egr malfunction code

po400 ive herd it is a nightmare dose the intake have to come off to fix it

P0400 NO YOU DO NOT HAVE TO TAKE OFF THE INTAKE TAKE YOUR EGR VALVE OFF GET YOUR SELF A PIECE OF PIANO WIRE AT LEAST 30 INCHS LONG PUT IT IN YOUR DRILL SPRAY SOME CARP CLEANER IN THE HOLES AND PUT THE PIANO WIRE IN THE HOLE AND DRILL IT IT SHOULD HELP CLEAN OUT THE CARBON THAT MIGHT BE CLOGING THE HOLES