While uncommon, it is possible that a check engine light may come on after installing
a K&N air filter or performance intake system—but this does not necessarily mean
that there is something wrong with your air filter or intake system. Occasionally,
the increase in airflow and lower restriction provided by a K&N air filter or intake
system will uncover an existing mechanical or electronic issue in a vehicle. In rare
cases, you may have a K&N product which was manufactured outside of its design
tolerances, causing sensors in your vehicle to read data outside of their normal
expected values. Please contact customer service if you have any concerns regarding
your vehicle’s performance after the installation of a K&N product.