look for rust in the gas cap center hole on the white part and if there is any
it's bad

JELo wrote:

> > You have a leak in the gas cap, or the gas cap is missing.
> >
> > 0442 = Evaporative Emission Control System Leak Detected (small leak)
> > 0455 = Evaporative Emission Control System Leak Detected (gross leak)
> >
> >
> > I would not even consider the cause for the 442, and focus my attention on
> > the 455. After all, a small leak is only a small leak until it is a big
> > leak, but a big leak is a small leak in the beginning. My guess is that your
> > cap is not being put on well, or it has a diaphram of sorts inside that is
> > failing or has failed. either way, you need a gas cap. If you have a locking
> > gas cap, take it off and leave it at home for a couple of weeks while you
> > use the factory gas cap, or any other gas cap for that matter. Clear the
> > code and replace the cap, and see if the code comes back. I don't think it
> > will, and then you can spend the Family Fortune, or your kid's college fund,
> > and buy a new locking gas cap.
> I am the only one who drives this thing so
> I can't blame it on the wife this time . . .
> but I did notice that the cap 'ratchets' way
> too easily. So I suspect it is not sealing
> properly. Never wore out a gas cap before!?
>
> So I pulled the line that comes from the gas
> tank and attaches to the charcoal canister
> in the engine compartment and connected a
> little tire pump to it. With the pump running,
> sometimes the line and tank would hold
> pressure when I screwed the gas cap on
> and sometimes it wouldn't. So that may
> be the culprit. Hmmmmmm
>
> Thanks for the ideas, I'll check the other
> hoses too. JELo '02 TJ Sport
>
> > > Okay, so warranty expired a few months back
> > > and now I start getting the dreaded P0442 and
> > > P0455 MIL errors (small and large leaks in the
> > > evap emissions system). I have reset the
> > > computer several times and they keep coming
> > > back - no other errors though.
> > >
> > > So I want to start by replacing the gas cap as
> > > some have suggested elsewhere. Local dealership
> > > (the only one for 150 miles in any direction) wants
> > > $20 and they would have to order it! Is there
> > > anywhere online I can get a factory gas cap for
> > > a reasonable price?
> > >
> > > What other things should I be checking related
> > > to these codes?
> > >
> > > Any ideas greatly appreciated . . . JELo

 

Out here in the boonies (north central Wyoming),
Jeep is a sideline for the local GMC dealership and
they'd really rather sell you a GM product so they
don't stock much in the way of Jeep stuff. JELo


> as many i replace in a week i'm shocked they had to
> order it we have a
> least one for each model
>
> JELo wrote:
>
> > Okay, so warranty expired a few months back
> > and now I start getting the dreaded P0442 and
> > P0455 MIL errors (small and large leaks in the
> > evap emissions system). I have reset the
> > computer several times and they keep coming
> > back - no other errors though.
> >
> > So I want to start by replacing the gas cap as
> > some have suggested elsewhere. Local dealership
> > (the only one for 150 miles in any direction) wants
> > $20 and they would have to order it! Is there
> > anywhere online I can get a factory gas cap for
> > a reasonable price?
> >
> > What other things should I be checking related
> > to these codes?
> >
> > Any ideas greatly appreciated . . . JELo

 

Out here in the boonies (north central Wyoming),
Jeep is a sideline for the local GMC dealership and
they'd really rather sell you a GM product so they
don't stock much in the way of Jeep stuff. JELo


> as many i replace in a week i'm shocked they had to
> order it we have a
> least one for each model
>
> JELo wrote:
>
> > Okay, so warranty expired a few months back
> > and now I start getting the dreaded P0442 and
> > P0455 MIL errors (small and large leaks in the
> > evap emissions system). I have reset the
> > computer several times and they keep coming
> > back - no other errors though.
> >
> > So I want to start by replacing the gas cap as
> > some have suggested elsewhere. Local dealership
> > (the only one for 150 miles in any direction) wants
> > $20 and they would have to order it! Is there
> > anywhere online I can get a factory gas cap for
> > a reasonable price?
> >
> > What other things should I be checking related
> > to these codes?
> >
> > Any ideas greatly appreciated . . . JELo

 

Out here in the boonies (north central Wyoming),
Jeep is a sideline for the local GMC dealership and
they'd really rather sell you a GM product so they
don't stock much in the way of Jeep stuff. JELo


> as many i replace in a week i'm shocked they had to
> order it we have a
> least one for each model
>
> JELo wrote:
>
> > Okay, so warranty expired a few months back
> > and now I start getting the dreaded P0442 and
> > P0455 MIL errors (small and large leaks in the
> > evap emissions system). I have reset the
> > computer several times and they keep coming
> > back - no other errors though.
> >
> > So I want to start by replacing the gas cap as
> > some have suggested elsewhere. Local dealership
> > (the only one for 150 miles in any direction) wants
> > $20 and they would have to order it! Is there
> > anywhere online I can get a factory gas cap for
> > a reasonable price?
> >
> > What other things should I be checking related
> > to these codes?
> >
> > Any ideas greatly appreciated . . . JELo

 

Out here in the boonies (north central Wyoming),
Jeep is a sideline for the local GMC dealership and
they'd really rather sell you a GM product so they
don't stock much in the way of Jeep stuff. JELo


> as many i replace in a week i'm shocked they had to
> order it we have a
> least one for each model
>
> JELo wrote:
>
> > Okay, so warranty expired a few months back
> > and now I start getting the dreaded P0442 and
> > P0455 MIL errors (small and large leaks in the
> > evap emissions system). I have reset the
> > computer several times and they keep coming
> > back - no other errors though.
> >
> > So I want to start by replacing the gas cap as
> > some have suggested elsewhere. Local dealership
> > (the only one for 150 miles in any direction) wants
> > $20 and they would have to order it! Is there
> > anywhere online I can get a factory gas cap for
> > a reasonable price?
> >
> > What other things should I be checking related
> > to these codes?
> >
> > Any ideas greatly appreciated . . . JELo

 

> > > You have a leak in the gas cap, or the gas cap is missing.
> > >
> > > 0442 = Evaporative Emission Control System Leak Detected (small leak)
> > > 0455 = Evaporative Emission Control System Leak Detected (gross leak)
> > >
> > >
> > > I would not even consider the cause for the 442, and focus my
attention
> on
> > > the 455. After all, a small leak is only a small leak until it is a
big
> > > leak, but a big leak is a small leak in the beginning. My guess is
that
> your
> > > cap is not being put on well, or it has a diaphram of sorts inside
that
> is
> > > failing or has failed. either way, you need a gas cap. If you have a
> locking
> > > gas cap, take it off and leave it at home for a couple of weeks while
> you
> > > use the factory gas cap, or any other gas cap for that matter. Clear
the
> > > code and replace the cap, and see if the code comes back. I don't
think
> it
> > > will, and then you can spend the Family Fortune, or your kid's college
> fund,
> > > and buy a new locking gas cap.
> > I am the only one who drives this thing so
> > I can't blame it on the wife this time . . .
> > but I did notice that the cap 'ratchets' way
> > too easily. So I suspect it is not sealing
> > properly. Never wore out a gas cap before!?
> >
> > So I pulled the line that comes from the gas
> > tank and attaches to the charcoal canister
> > in the engine compartment and connected a
> > little tire pump to it. With the pump running,
> > sometimes the line and tank would hold
> > pressure when I screwed the gas cap on
> > and sometimes it wouldn't. So that may
> > be the culprit. Hmmmmmm
> >
> > Thanks for the ideas, I'll check the other
> > hoses too. JELo '02 TJ Sport
>
> In any case, limit your search for now to physical leaks and forget about
> sensors and crap like that. The code(s) you are getting are the same fault
> in varying severities, when you find the gaping hole and fix it, the code
> for the minor leak will go away.
Have looked and looked and I can't seem to find
anything that even looks like it could be a hose
related problem. At only 22K miles, everything
under the hood still looks realy good. I'm going
to keep looking though.

> You are aware that you can check out the code reader from the auto parts
> store and reset the codes, right? At least you can use the code reader for
> free in the Once Great State of California, now known as the People's
> Republik of Kaleefornia. You can buy one on eBay for about $75.
I did get one off of Ebay a while back and it has
proved useful in a few situations. At least now I
can erase the codes without having to reprogram
the radio!

Thanks to all for the help, JELo

 

> > > You have a leak in the gas cap, or the gas cap is missing.
> > >
> > > 0442 = Evaporative Emission Control System Leak Detected (small leak)
> > > 0455 = Evaporative Emission Control System Leak Detected (gross leak)
> > >
> > >
> > > I would not even consider the cause for the 442, and focus my
attention
> on
> > > the 455. After all, a small leak is only a small leak until it is a
big
> > > leak, but a big leak is a small leak in the beginning. My guess is
that
> your
> > > cap is not being put on well, or it has a diaphram of sorts inside
that
> is
> > > failing or has failed. either way, you need a gas cap. If you have a
> locking
> > > gas cap, take it off and leave it at home for a couple of weeks while
> you
> > > use the factory gas cap, or any other gas cap for that matter. Clear
the
> > > code and replace the cap, and see if the code comes back. I don't
think
> it
> > > will, and then you can spend the Family Fortune, or your kid's college
> fund,
> > > and buy a new locking gas cap.
> > I am the only one who drives this thing so
> > I can't blame it on the wife this time . . .
> > but I did notice that the cap 'ratchets' way
> > too easily. So I suspect it is not sealing
> > properly. Never wore out a gas cap before!?
> >
> > So I pulled the line that comes from the gas
> > tank and attaches to the charcoal canister
> > in the engine compartment and connected a
> > little tire pump to it. With the pump running,
> > sometimes the line and tank would hold
> > pressure when I screwed the gas cap on
> > and sometimes it wouldn't. So that may
> > be the culprit. Hmmmmmm
> >
> > Thanks for the ideas, I'll check the other
> > hoses too. JELo '02 TJ Sport
>
> In any case, limit your search for now to physical leaks and forget about
> sensors and crap like that. The code(s) you are getting are the same fault
> in varying severities, when you find the gaping hole and fix it, the code
> for the minor leak will go away.
Have looked and looked and I can't seem to find
anything that even looks like it could be a hose
related problem. At only 22K miles, everything
under the hood still looks realy good. I'm going
to keep looking though.

> You are aware that you can check out the code reader from the auto parts
> store and reset the codes, right? At least you can use the code reader for
> free in the Once Great State of California, now known as the People's
> Republik of Kaleefornia. You can buy one on eBay for about $75.
I did get one off of Ebay a while back and it has
proved useful in a few situations. At least now I
can erase the codes without having to reprogram
the radio!

Thanks to all for the help, JELo

 

> > > You have a leak in the gas cap, or the gas cap is missing.
> > >
> > > 0442 = Evaporative Emission Control System Leak Detected (small leak)
> > > 0455 = Evaporative Emission Control System Leak Detected (gross leak)
> > >
> > >
> > > I would not even consider the cause for the 442, and focus my
attention
> on
> > > the 455. After all, a small leak is only a small leak until it is a
big
> > > leak, but a big leak is a small leak in the beginning. My guess is
that
> your
> > > cap is not being put on well, or it has a diaphram of sorts inside
that
> is
> > > failing or has failed. either way, you need a gas cap. If you have a
> locking
> > > gas cap, take it off and leave it at home for a couple of weeks while
> you
> > > use the factory gas cap, or any other gas cap for that matter. Clear
the
> > > code and replace the cap, and see if the code comes back. I don't
think
> it
> > > will, and then you can spend the Family Fortune, or your kid's college
> fund,
> > > and buy a new locking gas cap.
> > I am the only one who drives this thing so
> > I can't blame it on the wife this time . . .
> > but I did notice that the cap 'ratchets' way
> > too easily. So I suspect it is not sealing
> > properly. Never wore out a gas cap before!?
> >
> > So I pulled the line that comes from the gas
> > tank and attaches to the charcoal canister
> > in the engine compartment and connected a
> > little tire pump to it. With the pump running,
> > sometimes the line and tank would hold
> > pressure when I screwed the gas cap on
> > and sometimes it wouldn't. So that may
> > be the culprit. Hmmmmmm
> >
> > Thanks for the ideas, I'll check the other
> > hoses too. JELo '02 TJ Sport
>
> In any case, limit your search for now to physical leaks and forget about
> sensors and crap like that. The code(s) you are getting are the same fault
> in varying severities, when you find the gaping hole and fix it, the code
> for the minor leak will go away.
Have looked and looked and I can't seem to find
anything that even looks like it could be a hose
related problem. At only 22K miles, everything
under the hood still looks realy good. I'm going
to keep looking though.

> You are aware that you can check out the code reader from the auto parts
> store and reset the codes, right? At least you can use the code reader for
> free in the Once Great State of California, now known as the People's
> Republik of Kaleefornia. You can buy one on eBay for about $75.
I did get one off of Ebay a while back and it has
proved useful in a few situations. At least now I
can erase the codes without having to reprogram
the radio!

Thanks to all for the help, JELo

 

> > > You have a leak in the gas cap, or the gas cap is missing.
> > >
> > > 0442 = Evaporative Emission Control System Leak Detected (small leak)
> > > 0455 = Evaporative Emission Control System Leak Detected (gross leak)
> > >
> > >
> > > I would not even consider the cause for the 442, and focus my
attention
> on
> > > the 455. After all, a small leak is only a small leak until it is a
big
> > > leak, but a big leak is a small leak in the beginning. My guess is
that
> your
> > > cap is not being put on well, or it has a diaphram of sorts inside
that
> is
> > > failing or has failed. either way, you need a gas cap. If you have a
> locking
> > > gas cap, take it off and leave it at home for a couple of weeks while
> you
> > > use the factory gas cap, or any other gas cap for that matter. Clear
the
> > > code and replace the cap, and see if the code comes back. I don't
think
> it
> > > will, and then you can spend the Family Fortune, or your kid's college
> fund,
> > > and buy a new locking gas cap.
> > I am the only one who drives this thing so
> > I can't blame it on the wife this time . . .
> > but I did notice that the cap 'ratchets' way
> > too easily. So I suspect it is not sealing
> > properly. Never wore out a gas cap before!?
> >
> > So I pulled the line that comes from the gas
> > tank and attaches to the charcoal canister
> > in the engine compartment and connected a
> > little tire pump to it. With the pump running,
> > sometimes the line and tank would hold
> > pressure when I screwed the gas cap on
> > and sometimes it wouldn't. So that may
> > be the culprit. Hmmmmmm
> >
> > Thanks for the ideas, I'll check the other
> > hoses too. JELo '02 TJ Sport
>
> In any case, limit your search for now to physical leaks and forget about
> sensors and crap like that. The code(s) you are getting are the same fault
> in varying severities, when you find the gaping hole and fix it, the code
> for the minor leak will go away.
Have looked and looked and I can't seem to find
anything that even looks like it could be a hose
related problem. At only 22K miles, everything
under the hood still looks realy good. I'm going
to keep looking though.

> You are aware that you can check out the code reader from the auto parts
> store and reset the codes, right? At least you can use the code reader for
> free in the Once Great State of California, now known as the People's
> Republik of Kaleefornia. You can buy one on eBay for about $75.
I did get one off of Ebay a while back and it has
proved useful in a few situations. At least now I
can erase the codes without having to reprogram
the radio!

Thanks to all for the help, JELo