See also:

Coolant
The coolant should be changed at the intervals specified in the maintenance schedule. ...

Vapor hose and fuel filler cap
The vapor hose and fuel filler cap should be inspected at those intervals specified in the maintenance schedule. Make sure that a new vapor hose or fuel filler cap is correctly replaced. ...

Exhaust Emission Control System
The Exhaust Emission Control System is a highly effective system which controls exhaust emissions while maintaining good vehicle performace. ...