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Topic Review (Newest First)
03-09-2011 10:46 PM
Gumpy2030 I came across this video on YouTube that I thought was pretty cool. I wish I could get my hands on one of those smoke machines because I could do that my self and not have to pay the shop $70 bucks just to hook it up plus the cost to fix the hoses. Any one know if you can rent those from Checkers?

http://www.youtube.com/watch?v=yKVq2BjG1X0
03-09-2011 05:29 PM
Gumpy2030 So I have checked all my hoses and even pulled the gas filler neck out to make sure there is nothing wrong there. I can't find anything visually wrong. I guess I am having the local shop run a smoke test on it tomorrow and see what they find. He said it may be a bad solenoid which would run about $150 to change. That sounds really high but I have no idea. I am running out of time because I have a guy wanting to buy it now and we are just waiting on getting this code fixed.
03-02-2011 10:03 PM
jkaufman_95
Quote:
Originally Posted by john97TJ

I've bought 5, not because of codes, but because I keep leaving the cap on the top of my Jeep and then driving away.
I did that. With a bus. But I left the fleet fuel card on top of the pump with it. Oops. Oh yeah where was the pin? Written on the card.
03-02-2011 09:43 PM
john97TJ
Quote:
Originally Posted by jasonwrangler View Post
just get a new one. its 5 bucks.
I've bought 5, not because of codes, but because I keep leaving the cap on the top of my Jeep and then driving away.
03-02-2011 09:22 PM
Hardermods Check all the hoses around your charcoal canister. Chrysler hoses at the 90 degree bends tend to crack or come loose and fall off

03-02-2011 08:45 PM
Gumpy2030 Well I have been fighting this code forever. I replaced the gas cap about a month ago and reset the codes by unhooking the battery. The P0455 code comes right back and wont go away. I guess it is time to start following the lines and figuring out where this stupid leak is. Hard to sell a Jeep when your check engine light is on.
02-01-2011 09:42 AM
wanderer1951 take the cap off, then put it back on . Light should go out after a bit. Ive had it happen a few times,
01-31-2011 07:27 PM
jasonwrangler
Quote:
Originally Posted by Gumpy2030 View Post
Is there a way to test and see if the gas cap is bad without just replacing it? I did a quick visual on it and the seal looks fine.
just get a new one. its 5 bucks.
01-31-2011 07:10 PM
OsageJeep My light just came on tonight as well and I got the P0455 code too...anymore info?
12-06-2010 05:33 PM
Gumpy2030 Is there a way to test and see if the gas cap is bad without just replacing it? I did a quick visual on it and the seal looks fine.
12-05-2010 01:46 PM
JD Adams I agree; most 455's involve a loose fuel cap. If it's an aftermarket cap, check that the internal valve has not failed and that the seals are good.
12-05-2010 12:20 AM
s3nt3nc3d In MOST cases, a large evap leak is caused by a faulty or loose gas cap. Definitely try that first.
12-04-2010 09:36 PM
JDsDream I copied this from another site. Hope it helps.

P0455 is a large leak in the evaporative emissions system. This is the system that stores fuel vapors and burns them in the engine. A large leak sounds like it may be easy to find, but it can be as small as a .040" crack in a hose. Start at the gas cap. Make sure it's tight, make sure the seal is ok, make sure the check valve in the center shows no signs of corrosion or rust. If it does, replace it.



If the cap looks ok you would need to slide under and start checking lines underneath. From the filler neck to the tank, and then the evaporative emissions lines from the tank up to the engine compartment. In the left front corner of the engine compartment you will find where the lines all end up. The leak detection pump, the charcoal canister, and the purge solenoid are all up there. Check all lines for any cracks or holes. If you don't find anything you can also check the purge solenoid for leakage with a hand held vacuum pump.



If you just can't find the leak you can take it to a shop. They will have a special machine for finding these hard to find leaks. It hooks into the system and pressurizes it with smoke, and you find the leak by finding the source of the leaking smoke.
12-04-2010 08:55 PM
Gumpy2030
Quote:
Originally Posted by 06TJfototkr View Post
Put the key in, then turn it to ON (the spot it goes to right before you start the Jeep), and then turn it a click back. Do that 3 times (ON, OFF, ON, OFF, ON) and if you did it right you should see the codes pop up where the mileage usually is, then it will say "done."

On older TJs, a light would flash a few times. Luckily on 04-06s (maybe 03s?) it reads the actual P0xxx codes.
Thanks that process worked perfect. I get the code P-0455 which from other posts appears to be the following.

"This indicates a fuel vapor leak or lack of purge flow in the EVAP control system. It means a large leak has been detected."

I will do some reading up and see if I can't figure out what has caused this. Hopefully just my gas cap but I am not usually that lucky.
12-04-2010 07:58 PM
Robinh57 Go to autozone. They will code you for free.
12-04-2010 07:15 PM
06TJfototkr Put the key in, then turn it to ON (the spot it goes to right before you start the Jeep), and then turn it a click back. Do that 3 times (ON, OFF, ON, OFF, ON) and if you did it right you should see the codes pop up where the mileage usually is, then it will say "done."

On older TJs, a light would flash a few times. Luckily on 04-06s (maybe 03s?) it reads the actual P0xxx codes.
12-04-2010 07:15 PM
6InARowMakesItGo ive seen a way to do it like you described but ive never been able to get mine to do it. ghetto zone will do it for free.
12-04-2010 06:35 PM
Gumpy2030
Decoding Check Engine Light

My check engine light came on today. Is there a way to read what that code is telling me to do without taking it to a shop? I know on older trucks I have had you can turn the keys a few times and then count the amount of times the check engine light flashed. Then the number of flashes correlated to a distinct code I was able to find on the internet or a chilton manual.

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