6.6 duramax engine power reduce and maf problem

[Rumpamuro]

Hello everyone. I was wondering if there is anyone on the forum that has had a problem with there 07-current 6.6 duramax with engine light giving codes of mass air flow and engine power reduce on the dash?
any help would be appreciated.

[Rumpamuro]

Just an update, Dealer replaced fuel rail, oil cooler, oil cooler lines and changed both batteries(because they were weak not for anything else) and do far so good. very wierd if you ask me. They a;so will be replaacing the maf as soon as it comes in but the truck has ran great without it.