Re: Aftermarket intake cause mass air flow sensor fail
I've heard of so many CE lights going off and codes being set for MAF related issues, (including on my son's car) after installing an aftermarket air intake system that I have to believe there is a relationship.
Since (blindly) replacing the MAF sensor is so expensive (and time consuming, if you count swapping out intake systems for warranty work), I'd look into different techniques for cleaning the MAF sensor - at least as a first step. There are several solvents (sprays) to clean them, but remember, this is a DELICATE part (i.e., a hair-thin wire), but I wouldn't be afraid to try it. Some methods involve careful spraying, others involve pouring a limited amount of electronic-friendly solvent in a plastic bag and carefully agitating, while both require thorough drying afterwards.
Search the web, g'luck!