Have anyone cleaned theirs after getting CEL bank 0 / 1 too rich? I am on my 2nd MAF which has 22k miles on it and 1 year and CEL came on today. I think the warranty is 2 years I will have to check with my mechanic. It has K&N filter and I am thinking about taking it out. My 1st MAF went 3 weeks after putting in the K&N filter. Coincidence?