Operation

OPERATION

The loss of any fuel vapor out of fuel filler tube is prevented by the use of pressure-vacuum fuel fill cap. Relief valves inside the cap will release fuel tank pressure at predetermined pressures. Fuel tank vacuum will also be released at predetermined values. This cap must be replaced by a similar unit if replacement is necessary. This is in order for the system to remain effective.

CAUTION: Remove the fill cap before servicing any fuel system component to relieve fuel tank pressure. If the cap is left off or loose, a Diagnostic Trouble Code (DTC) may be set.