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kylekae 10-23-2013 02:48 PM

P0457 not the gas cap.
P0457 keeps coming up after I clear it. I replaced the gas cap and it's still coming up. I'm dropped my tank before and know what to do. My garage smells a little gassy recently too.What component should I look at.

Big Sarge 10-23-2013 02:59 PM

did you replace with a Mopar cap or a cheap china made replacement from an auto parts store?

kylekae 10-23-2013 03:02 PM

I just got one at napa I don't think it's moose. But say it's not the gas cap. What could it be.

Big Sarge 10-23-2013 03:05 PM

If you are 100% positive that it's not the cap (i bet it is) then you have a large evap leak somewhere. Lots of good info on the web, 99% point to a bad cap.

P0457 Jeep EVAP System Loose Fuel Cap OBDII Engine Light Trouble Code |

bigcat 10-23-2013 03:37 PM

I'd check that moose cap (kidding). Check the evap cannister, and the lines especially...I had a few rot holes in mine that caused the code...Then you can go back to your original cap. I hated the replacement

lt706 10-23-2013 06:19 PM

Is it running rough or hard to start at all?

workshop4ever 10-23-2013 07:59 PM

I had the same problem recently and found that my EVAP solenoid was installed upside down. After you double-check the cap, check every inch of the lines, I would look at the solenoid. It should be labeled "TOP" and obviously....that side should be on top.

kylekae 10-25-2013 12:34 PM

I re tightened the fule filler neck and reconnected all the fuel line and it has seemed to go away

kylekae 10-28-2013 09:29 AM

So the damn night came back on and now it's p0456 and 457. Ideas? Should I just take it to the dealership?

KaiserJeep 10-28-2013 10:10 AM

The dealership DOES have a smoke generator they can use to find leaky hoses. They charged me $328, mostly labor, to drop the tank and find/replace two leaky rubber hoses. It was over and done in a half day and has not come back in three years.

I was expecting this to be a repair covered by the emissions warranty and it was not. The emissions warranty only covers the converters and other "major components", not including hoses. This repair happened about 2 months after my seven year bumper-to-bumper warranty expired.

lt706 10-28-2013 08:41 PM

Beside the code does it start hard or have a loss in power? Can you smell any gas fumes?

ztman 10-28-2013 08:47 PM

Mine did the same thing, dealer replaced the EVAP solenoid. Smoke test and solenoid was about $300

kylekae 10-28-2013 09:09 PM

No hard starting but the garage smells kinda gassy every now and then. But the car only has 50k and I had the tank replaced by the dealer for the same reason last year.

lt706 10-30-2013 09:21 PM

Can you see the fuel pump the plastic nut that holds it in can pop loose causing a vapor leak this happened to me and took me months to figure it out

kylekae 10-30-2013 09:23 PM


Originally Posted by lt706 (Post 5774874)
Can you see the fuel pump the plastic nut that holds it in can pop loose causing a vapor leak this happened to me and took me months to figure it out

I may drop the tank and check tomorrow

dcmtex 10-30-2013 09:39 PM

Check the evap canister under the battery. Mine was ate up. Stop eating the beans and the gassy smell will go away :) Good luck!

tuleyoil 10-30-2013 10:32 PM

I would look at the solenoid. It should be labeled "TOP" and obviously....that side should be on top.

kylekae 10-31-2013 08:46 AM


Originally Posted by tuleyoil (Post 5776658)
I would look at the solenoid. It should be labeled "TOP" and obviously....that side should be on top.

Where is this solenoid located

workshop4ever 11-01-2013 05:21 AM

1 Attachment(s)
Drivers side of the engine bay.

Greentj05 11-01-2013 06:04 AM

Actually, if yours is an 06' it should be tucked behind the R/R wheel behind the inner fender. Sometimes an internal fault with some of these parts can throw false "leak" codes too.

kylekae 11-01-2013 09:01 AM

Found mine and it was under the hood exactly as the diagram. It was upright. Also took the gas cap to the emission place and tested the cap. It is GOOD. I hate this gas tank. I have had it replaced twice, dealership paid for it the second time because they screwed up. Then I put a savvy gas tank skid on so I'm not afraid to drop it now. And don't want to pay the dealership 1k again. Should I take it and get a smoke test in the tank. Or take it to the dealership.

gmiller0737 11-01-2013 11:25 AM

Best way to diagnose is to follow the Diagnostic "Tree" in the service manual, Followed by a thorough inspection of all hoses & such,A smoke test may be needed as well

Habib 11-01-2013 12:05 PM

My Jeep had a leak around the fuel pump/sending unit gasket on top of the tank. Fixed under warranty, even though it has Kilby tank skid.

If the Savvy skid doesn't have a recess for the reservoir, it could have compromised the gasket. Pretty sure my Kilby did.

kylekae 11-01-2013 01:27 PM

The savvy skid does have an indentation for the fuel pump. So I think I may go get a smoke test

kylekae 11-03-2013 07:01 PM

Just got p0700 along with p0456 again. I think my tcm may be shot. Or any ideas?

kylekae 11-06-2013 09:05 AM


lt706 11-07-2013 06:57 PM

Have you checked the fuel pressure yet?

kylekae 11-07-2013 10:16 PM

No how would I do that? The car runs fine. No sputtering

lt706 11-10-2013 07:03 PM

With a fuel pressure gage you hook it up to the fuel rail

ChaddG 11-12-2013 04:23 PM

check all the rubber connectors going from your evap to your purge, to your intake.
I'm betting it is a rubber fitting. I had the same codes. minor leak and large leak.
I would assume the gas cap usually doesn't go bad.
I got my hoses from the dealer, cost me 40.00 for the set. replaced em, cleared the codes, and never returned. there is a green cap next to the evap on mine and the rubber fittings were cracked in places that weren't obvious until I took the lines off and inspected them.
Good luck.

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