Hello welcome to just answer I am master tech and will be able to assist you today.
this is a tank side leak could be from a bad fuel cap or a leak in the system so the first step here is to inspect the fuel cap and see if the seal is concave or round
yes I seen it
how big of a job this is.
first we need to see why this code is coming on and what part in the system is causing this
the simple check is something you can do with out a smoke machine.
ok and the only code stored is the p1456
ok so lets first check the fuel cap and see what the seal looks like .
if this does not look round at all then replace it. normally these will be smashed and look flat
yes the entire cap'
no the light will stay on until it's cleared
does the seal look like it's concave or smashed ?
well if this was tight and the seal looks good I would try a new cap or have this tested and if this is good (which I have a feeling it's bad) then the system needs to be tested and this will require a smoke machine and most auto shops have these to test the systems
well this p1456 is a evap code indication a leak in the system so this could be a bad ftp sensor or a 2 way valve from over filling the tank when the gas pump stops and it's topped off .
this is a real common failure we see
yes im sure that the 2 way valve and the ftp sensor is bad and also may have a bad evap canister from this. so if this is a regular practice then i would feel confident that this is the issue at hand
these items are not cheap
plus about 1.5 hours of labor to replace these items
it should be yes
if your going to get this passed for a inspection it will never pass
not really only the earth from the gas fumes