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  #1  
Old 08-05-2008, 05:35 AM
KRD KRD is offline
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Codes P0442, P0455

P0442 (M) Evap Leak Monitor Meduim Leak Detected A small leak has been detected in the evaportive sysem.

P0455 (M) Evap Leak Monitor Large Leak Detected A large leak has been detected in the evaporative sysem.

These 2 code have been on my truck since I started driving it. Should I be concerened, how do I fix it? Not real sure where to start.

I think I will reset them tomarrow and see if they pop again.

Zak
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  #2  
Old 08-05-2008, 05:37 AM
KRD KRD is offline
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Just found the gas cap post. Gonna give that a try.

I know, I should search first.
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Old 08-05-2008, 06:05 AM
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Don't feel bad. I've been reading everything I see on these codes to see if i can get a feel for a fix. I'm not convinced a gas cap will fix with the medium and large leak codes. Thinking my other option is to replace the lines from the cannister forward with fuel line.
So let me know if the gas cap works out for you. Good luck.
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  #4  
Old 08-05-2008, 06:10 AM
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^^ x2, somebody correct me if I'm wrong, but I thought the gas cap fix was for the P0441 small evap leak detected code. That's what I had earlier this year, and the gas cap fixed it, but I thought I remembered reading that the P0442/P0455 codes meant you had bigger problems. Still though, start with the easy stuff and change the gas cap.

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  #5  
Old 08-05-2008, 06:20 AM
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i had the same trouble code when i had my quad cab...first thing i did was change the gas cap...didn't work so then i took my truck to the dealer to have a smoke test done and the hose was roted where the smoke test machine contacts..they cut that piase out and boom..no more code.

To have it smoke tested cost $49
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  #6  
Old 08-05-2008, 04:17 PM
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I've heard of the gas cap causing medium leaks.....either way it's the easiest thing to check so why not?
After that you need to check all the evap hoses going to the charcoal tank under the truck (black box in front of the gas tank) and all the hoses in the engine bay. Don't just glance at them actually look at every inch make sure everything is connected and undamaged
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  #7  
Old 08-05-2008, 06:05 PM
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filling up with the engine running can cause the large leak code too.
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  #8  
Old 08-05-2008, 06:31 PM
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Gas cap fixed mine...
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  #9  
Old 08-06-2008, 02:03 AM
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Not in the habit of filling up with the engine on, so no dice there.

The way my luck runs I might as well start with the lines and then go to the cap. Then I won't have to worry about the lines later on (hopefully).

Think I'll keep my $50 and skip the smoke test.

Unless somebody can figure out a way to remove the system completely...and so far looks like that's still major "iffy" at best.
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Old 08-06-2008, 02:18 AM
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Quote:
Originally Posted by rt59dak View Post
Not in the habit of filling up with the engine on, so no dice there.

The way my luck runs I might as well start with the lines and then go to the cap. Then I won't have to worry about the lines later on (hopefully).

Think I'll keep my $50 and skip the smoke test.

Unless somebody can figure out a way to remove the system completely...and so far looks like that's still major "iffy" at best.
sometimes the hole could be a little pin hole and you might not see it by checking the lines with your eyes.
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  #11  
Old 08-06-2008, 04:34 AM
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So far I just reset the codes and it is still fine? About how long should it take for them to pop again? I droved it for maybe 10 miles after reseting.
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  #12  
Old 08-06-2008, 05:08 AM
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Quote:
Originally Posted by KRD View Post
So far I just reset the codes and it is still fine? About how long should it take for them to pop again? I droved it for maybe 10 miles after reseting.
everytime i reset mine i would drive about 300km and it would come back on.
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  #13  
Old 08-06-2008, 06:10 AM
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I know I might not see the hole, just thinking I'll replace lines. Kinda got it stuck in my head to do so...
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  #14  
Old 08-06-2008, 06:20 AM
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Quote:
Originally Posted by rt59dak View Post
I know I might not see the hole, just thinking I'll replace lines. Kinda got it stuck in my head to do so...
If you can't see any holes just take it in and get it smoke tested...by the time you start repalcing hoses it would have cost more money then its worth...my.02
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