I installed a K&N air intake in my 2020 navigator and I got a check engine light from it. Has anyone else had this problem or know how to fix it?
Hi Mike. Yes, this can and has happened to others and can be caused by various issues.
In all honesty, you would be better off re-installing the factory intake and selling the K&N. An aftermarket air intake will do nothing for performance and/or power, other than make a little more intake noise and look pretty.
The factory intake is a "Cold Air Intake" which brings air in through the sealed snorkel and delivers far more air to the intake system than the engine needs. The K&N and other so called "cold air intakes" are actually hot air intakes, since they do not properly seal/seal against the hood. Therefore, they actually deliver hot engine compartment air to the intake system.
Plus...and more importantly in my opinion... it will cause issues such as this,
and it can/will lead to possible warranty claims denials in the future, for certain engine problems and issues (such as CEL's).
Lincoln warranties the vehicle as it was sold to us. If we modify it, they can deny any warranty claim for problems that are even remotely connected/related to the modification. And modifications like this are specifically addressed in the Warranty Guide that comes with the vehicle when purchased new
Bottom line is: An aftermarket intake will do nothing for performance, can cause problems/issues (as it already has for you), and can lead to possible warranty claims issues/denials down the road.
Good luck with whatever you decide to do.