Diagnose gas tank fill problem

evap vent failures. are common.
even over filling the fuel tank.
the canister is near fuel tank just in front of it.
has its own mount. and 3 hoses.
all hoses must be good. and in place. no cracks.

2000 year example

Failure in the Evap System

Check for Evap Codes & diagnose that system

Most likely a failed evap vent solenoid

Google : OBD PO446 thru PO449 & read up

some cars do not allow refilling the gas tank too rapidly. If slightly turning the handle of the pump filler when pumping doesn't help, maybe there's another problem. Has this always been the case, or has this issue just started recently?

You need to have the Evap System properly
diagnosed, to find any issues ,never install parts
to resolve any vehicle issues

You find the problems first

Any evap leak or loss of pressure, could set the gas
cap light
That doesn't mean it is the problem with the system

your evap contaier needs to be replace most people call it a corcoil container its part of your evap system

You have an EVAP System Valve --- not a float, that
is a solenoid, that has failed to open, so you can fill
your fuel tank

Need EVAP System diagnosed & repaired

You have an EVAP System Malfunction that will
not allow you to fill the gas tank

There are several electrical solenoid type
valves in the system,one has failed

When you fill your tank all air is recovered by
the hose your using to fill it & put back in the
ground storage tank,not into the air

The failed vent valve in the EVAP System prevent
air out

The vent from the tank,to the fuel fill(small hose)is stopped up.

that is fuel tank evap related code.
It can be caused by simply removing the gas cap while the engine is running.
Dont get too concerned with this code if you think you may have opened the cap while car was running, the computer will soon turn the light off if all is well.
Other things Like ta cracked or faulty gas cap, The evap purge canister or hoses loose or cracked, filler neck hoses loose or cracked ,damaged orings on evap sensor. could also cause this code.
They often use a special smoke machine to diagnose leaks in the tank and evap system.
The special machine fills tank with smoke at 2 psi making it posible to spot leaks.
Hope this helps.
If it does dont forget to leave a comment.
(:DK

This is the same issues I'm having. Is there any answer to this?