Can a Leaking Exhaust Cause this?
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  1. #1
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    Can a Leaking Exhaust Cause this?

    My flex pipe needs to be changed. I am just wondering if it can cause the codes P2096 and P0441. P0441 says EVAP small leak/no flow condition and P0296 says post catalyst fuel trim system too lean bank 1.

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  3. #2
    murdered out Jetta, er, B5 Passat mrgreek2002's Avatar
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    When back in '05/'06 when I had a broken stock flex pipe, I never had a CEL or did my car throw any codes. So I say NO.

  4. #3
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    i would also say no because the flex pipe is after the o2 sensors, and theres nothing after it except piping.

  5. #4
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    Quote Originally Posted by 98B520vT View Post
    i would also say no because the flex pipe is after the o2 sensors, and theres nothing after it except piping.
    i thought theres one right after the flex pipe...

  6. #5
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    any input on what might be the cause of those 2 codes then? possibly anyone with the same codes?

  7. #6
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    nope. my flex section complty blow apart thanks to big turbo setup. and i ran my car like that for like 2months no codes. was loud as shit tho

  8. #7
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    i thought p0441 was the evap purge valve not working?

  9. #8
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    i changed the purge valve already so thats not it. i'm pretty sure its either vacuum hoses leaking or o2 sensor. just want to make sure i know which one it is before i spend a hundred bucks on a damn sensor.

  10. #9
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    FInd the vacum leak and that should take care of both of your codes.

  11. #10
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    I just pointed this link out yesterday to someone with the same problem. http://www.a4mods.com/index.php?page...tml&category=5 Build it and use it. The only surefire way to test for a leak is to pressure test the system. Don't make the mistake of throwing parts at it. Oh and no, the flexpipe isn't the problem. Like B5.5passat I had the same problem and it never made a difference.

  12. #11
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    I decided to go outside and get you guys some pictures. I think I found the mother effer setting off my CEL. And heres a pic of the vacuum hose diagram under the hood for any of you who might want it. What do you guys think? That has to be it right?

  13. #12
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    i'd just replace the hoses man, honestly it's going to run you a few bucks . i replaced most of mine today and if you replace the hoses you have one less thing to worry about . i got 3 feet of hose for like 2 bucks. if new hoses dont fix it then look at the o2 sensor.

  14. #13
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    How come I don't have one of those vacuum line stickers under the hood.

    BTW your going to need about 6-8 feet of hose to replace all the lines.

  15. #14
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    yeah i changed the hoses already, but its still throwing a CEL

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    Do you have a V6? B/c when my flex section began to leak, my car threw a CEL. Was it related? Don't know, but it could be. Also, it could be the exhaust solenoid. That is an expensive fix, I just had mine done. Fixed my CEL woes.

  17. #16
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    Quote Originally Posted by BlueBayou View Post
    Do you have a V6? B/c when my flex section began to leak, my car threw a CEL. Was it related? Don't know, but it could be. Also, it could be the exhaust solenoid. That is an expensive fix, I just had mine done. Fixed my CEL woes.
    agreed, my flex is leaking and it sounds like shit. i'm pretty sure thats the reason. the guy in my area that did it for me messed it up the first time so hes gonna redo it for free, but its so hard to get a hold of him.

  18. #17
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    make sure he uses the repair kit...it looks like a very long clamp, but it bends and flexes like it should. Not just welding it back or whatever.

  19. #18
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    theres a repair kit???....shit he already did one without using anything. do you think its a big deal?

  20. #19
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    Well, I had mine welded once (myself) and it didn't hold. I found a repair kit at NAPA. (surprising, I know) And it's a pretty simple fix after that.

  21. #20
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    all he did was cut off the flex pipe that was on there, and he welded a new flex pipe in, i thought it looked fine...whats the repair kit consist of?

  22. #21
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    Oh, that's fine. You're prolly all set now, I didn't realize he put in a new flex. That's cool.

  23. #22
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    ohh...you scared me for a sec lol. i was thinking that i should expect it to be dead again in a year.

  24. #23
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    no, no. you should be okay.

  25. #24
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    Quote Originally Posted by b5.5passat View Post
    nope. my flex section complty blow apart thanks to big turbo setup. and i ran my car like that for like 2months no codes. was loud as shit tho
    yours is 1.8t and his is v6...
    you dont have the O2 sensor after the flex and he does...

  26. #25
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    the o2 sensor code, is related to the flex pipe(however usually below threshold code popes up not the lean) but i would go for the flex first...

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