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    VWVortex


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    Thread: N112 and N249

    1. Member
      Join Date
      Jan 8th, 2009
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      San Diego, CA
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      2000 1.8T 4dr GLS
      10-06-2014 07:55 PM #1
      Are the N112 and the N249 located underneath the bracket on the front of the engine, the one the dipstick attaches to? I've got a rough idle when cold and a CEL and I think it has to do with one of these solenoids. The system has been checked and has no leaks, but it keeps throwing different versions SAI codes.

      TIA

    2. Member .Ant's Avatar
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      Tow truck
      10-07-2014 08:54 PM #2
      What codes is it throwing? We could help more if we knew them.
      Quote Originally Posted by Mr. Rictus
      Don't bomb threads with any variation of any combination of letters, numbers, words, phrases, icons, smilies, memes, pictures, videos or any other sort of post.
      Maintenance is paramount.
      GTS 3071R l Eurokraft Performance
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    3. Member
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      2000 1.8T 4dr GLS
      10-15-2014 02:47 PM #3
      Okay, I've got the codes:

      P1557, P1297, 90411, P0300, P0304.

    4. 10-16-2014 11:09 AM #4
      Car is overboosting and code for pressure drop between diverter valve and throttle body. The dv code could be from the n249 but normally from faulty dv or from aftermarket full atmospheric blow off... Motronic needs at lest partial recirculation. <--- could be giving you rough idle and misfires considering that what the p030x codes are. Are you running a manual boost controller if so I would remove it and set back to stock and same with any aftermarket blow off / diverter valve. Then be sure plug gap is correct (I gap to 0.028" personally) if you continue to get misfires swap coils from cylinder 4 to cylinder 1. If the misfire is on cylinder 1 after the swap replace that coil pack....

      General recommendation... A list of hardware changes / software reflash helps narrow down the possible issues you are having. You are more likely to get assistance

    5. Member
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      2000 1.8T 4dr GLS
      10-16-2014 12:36 PM #5
      Lowleyfetuner, thanks for all the advice and the general recommendation regarding hardware/software changes.

      My car is stock with 180K miles. 3 weeks ago I put in a new diverter valve and plugs that were pre-gapped to 0.032".

      Other replaced parts:

      163,000 - N80 valve, CPS, CTS
      176,500 - Post and Pre CAT O2 sensors
      177,300 - new hose to combi valve

      The coils are 2 years old but I've already had to replace one of them for a misfire, so another one could have gone.

      The car does rough idle when cold but seems to smooth out when it warms up.

      Looks like maybe I should start with the N249? Is that under the metal harness at the front of the engine that the dipstick attaches to? Any other advice is greatly appreciated!

    6. Junior Member mm2shields's Avatar
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      Jan 9th, 2009
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      2002 VW GTI 337
      10-18-2014 08:50 PM #6
      I have a N249 and N112 for sale, removed from my GTI when I did the emission system delete. Pm me for details.

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