1. Remove the air cleaner element. (See INTAKE-AIR SYSTEM REMOVAL/INSTALLATION [LF].)
2. Inspect the following items:
If there is any abnormality, clean or replace the air cleaner element.
Has the replacement interval come?
Is the air cleaner element soiled, damaged, or bent?
Are the air cleaner case and the air cleaner element correctly sealed?
Is the correct air cleaner element installed?