Hyundai Venue (QX): Evaporative Emission Control System / Fuel Filler Cap. Description and operation
A ratchet tightening device on the threaded fuel filler cap reduces the chances
of incorrect installation, which seals the fuel filler. After the gasket on
the fuel filler cap and the filler neck flange contact each other, the ratchet
produces a loud clicking noise indicating the seal has been set.

Removal
1.
Release the residual pressure in fuel line.
(Refer to Fuel Delivery System - "Release Residual Pressure in Fuel
Line")
2.
Other information:
Removal
lf replacement of the rear corner radar unit bracket or extension wire
is required, replace the defective part only with a new one.
1.