Ok Flat Rate Mechanic here again and I just want to do a quick video on what
you should do if you have a check fuel cap light on on your dash or check gas
cap light on in your dash a lot of times the code that's associated with that is
gonna be a p0442 small evap leak
you may also have a p0455 p0456 or a p0446 these are all evap
related codes and what is telling you is basically I'm you have a small leak in
the evap system in this video I'm going to show you what to check and what you
should do first before really spending any money on diagnostic I have my
scanner hooked up to this vehicle up here and we have we have a p0455 which
is actually a large leak typically when you have a gas cap light they set that's
got a set a p0442 which is a small leak also, not all cars actually have a gas cap
lights I know jeeps Honda's and Ford's have a check
fuel cap light and like this particular vehicle here infinity this one actually
just had a check engine light but I figured we had to eat that code and
after the problem I found on it which I'm going to show you guys it would be a
good opportunity to do a quick little video on the check fuel cap light so if
you haven't already be sure to hit that thumbs up button them subscribe to the
flat rate mechanic also I'm not gonna like I said I'm not gonna go into real
depth in this video about how the evap thought system works just more or less a
quick thing to try it if you have that gas cap light on if you want more
information on how the evaporative system actually works and more
information on those codes the p0442 and p0455 p0456 I will leave a few links
to other videos I have on the video description below and also up in the
I'll leave a car that rate up above here so basically what I found on this one
though let me go out to the gas cap
so if you guys have a check gas cap light obviously the first thing
you want to check it's the gas cap but big no-no I've seen the past is using
aftermarket gas caps which this one is an aftermarket gas cap also locking gas
caps are a big no-no those always run into tons of problems with a locking gas
caps best bet is spend the extra 15 20 bucks and go to the dealership give the
right cap for the car all right here's a big problem on this one I've already
smoked this and this thing was looking pretty bad but as you can see that
gas filler neck is rusted pretty badly so what I'm gonna have to
do is take I'm gonna stuff a rag down the hole so no debris gets into the gas
tank and we're just gonna take some Emery cloth to that and we're gonna
replace this aftermarket fuel cap with a factory unit and then once we do that
we're gonna just go ahead and clear the gas cap light and we're gonna clear the check engine
light now in some cases if you have a gas cap right you can clear the check
engine light and the gas cap like may still stay on I've run across that in a
few instances and I believe the only way to be able to clear that is actually drive
the vehicle the light will clear itself once monitors have set or the EVAP
system leak test has passed so if there's any other way to clear those
lights on the Fords I believe on the fours I ran into that I'll Peter the
check engine light and the gas cap light will still stay lit until the vehicle
is driven through a drive cycle and it passes a test if anybody knows any other
way be sure to I'll drop it in the comments below to help other
DIYers out there but how about does it for this video guys thanks for watching
until next time flat rate mechanic