this is probably what is happening with a the K&N filter in your car.
On Ford 500 and Freestyle with 3.0L, and codes P061B and/or P2106 check the air box to make sure it is clipped in correctly.  If it is loose or the air filter seal is torn it can
cause these codes and cause the car to go into limp in mode.
The way a K&N is set up either to much oil in the filter even if factory lubed or any air leak in engine like a bad grommet on engine wil probably set teh code. You can get the pcm reprogrammed for this i f you want but it'snot going to hlep a great deal.

Answered by hmac300 (expert)
17,939 answers provided

Its a cold air intake, like the full system. I already checked the system and I would bet my immortal soul that it is sealed. the K&N filter on the end is not excessively oiled and im sure of this... Ive had 3 of these systems before

Response from Jared1305
1 question asked

wel there seem s to be problems that crop up using these typesof filters as they suck a little more air than the stock ones. you can have your pcm reprogrammed to run it without those codes buti'm pretty sure this is wha t is causing your problem especially since y ou say you replace the srtock ones and the problem goes away.OBD2 is a funny system and doesn't like alot of things done to this that is why i asked to check the grommets on valve covers for loose or holes in it. that can cause the maf code as well because it 's an air leak.

Answered by hmac300 (expert)
17,939 answers provided