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Unread 05-13-2008, 03:07 PM   #1
AferVentus
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Gas Cap and Fault Codes

Hi,

On my '06 TJL, I had a check engine light, so I went through the 'push the odometer button while turning on' thing and it said no faults.

I then took it to the dealer and they said it was a loose gas cap. (I took the cap off before and put it back on to make sure but it was still the gas cap.)

My question is this: Why didn't the code show up in the odometer through the procedure that I used?

Thanks in advance.

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Unread 05-13-2008, 05:07 PM   #2
Rubikahn
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Has the CEL cleared? Was this the first time it happened? If not you may want to go back to dealer with this TSB number.

Make : JEEP Model : WRANGLER Year : 2006
Manufacturer : DAIMLERCHRYSLER CORPORATION
Service Bulletin Number : 1400106 Date of Bulletin : JAN 21, 2006
NHTSA Item Number : 10019243
Component : FUEL SYSTEM, OTHER
Summary :
LOOSE FUEL CAP MESSAGE OR MALFUNCTION INDICATOR LAMP ILLUMINATION FOR DIAGNOSTIC TROUBLE CODE P0457 - EVAP SYSTEM - LOOSE FUEL CAP. *TT
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Unread 05-14-2008, 02:22 PM   #3
AferVentus
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No, this is the first time it happened, and the dealer found the code P0457 and cleared it.

It just seems odd that it wouldn't show up in the dash for the consumer. (Me)
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Unread 05-14-2008, 02:40 PM   #4
03silversport
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My 03 just threw the same code a month ago. But instead, of the odometer button key trick, i rotated the key on-off, on-off, on-off, on, and the jeep showed the same code you have described. i went to the station, put some gas in the jeep and made sure the cap was on tight, started it back up and no more error code. (i went to autozone with the code and they printed out what it could be, therefore i knew it was the gas cap issue)
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Unread 05-14-2008, 02:51 PM   #5
Wheelin98TJ
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Yep, try the key trick next time.
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Unread 05-18-2008, 08:49 PM   #6
AferVentus
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Okay, it's doing it again. (Probably going to make them replace the locking cap, because it is still under warranty.)

Now is this from ACC to On or all the way off?
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Unread 05-18-2008, 08:56 PM   #7
Havoc
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off-on-off-on-off-on
watch odo meter

p0457 done ?
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Unread 05-18-2008, 09:06 PM   #8
M2LJ
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For one, you were doing the wrong procedure for getting an error code...

Turning the ignition on-off-on-off-on rapidly will cause any fault codes will display in the odometer (if none, will read 'done').

Depressing odometer reset button while turning on the ignition will initiate the instrument cluster checklist sequence. It has nothing to do with OBD codes, but it is pretty entertaining to watch!

By the way, did you replace the stock cap with a locking one? If so, and you didn't get the right cap (don't buy a generic locking cap, there is a specific one needed but you can get it at most auto parts stores), it will cause the code to throw. Trust me, I learned this the hard way...

Cheers! M2
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Unread 05-19-2008, 06:56 AM   #9
jwpmel
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You wouldnt happen to know that part # for that specific gas cap would you.
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Unread 05-19-2008, 07:27 AM   #10
blackattak
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I'd like the part # for the proper locking cap as well as I had this issue before as well.
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Unread 05-19-2008, 03:02 PM   #11
M2LJ
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The Mopar one is M05278655AA, but if you go to any large auto parts store, it will have a listing. Mine is a Stant, and I think the model number is 10508. It also fits on a Toyota..

But do not buy a generic one from WalMart, as it will throw codes!

Cheers! M2
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Unread 05-19-2008, 03:35 PM   #12
AferVentus
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I got this when the vehicle was new and now it is acting up. (It is from Mopar.)

Yes, the P0457 gas cap code showed up. By the way, what's the warranty on Mopar Parts? (I still have regular warranty.)

Thanks for your help everyone.
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