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p0171

  1. WANTED and FOR SALE
    So I just finished making a smoke machine for myself because I had codes P0171 and P0174, and it works great with good smoke output. I've made around 6 of them to sell, so PM me or reply here if you'd like to purchase one. (if they sell out and more people want them, I will make more of them)...
  2. MKIV GTI
    My 2002 1.8T is throwing 5 codes: P0171 (mixture too lean) and P0300-P0303 (misfires). I recently replaced the MAF and the spark plugs, and I couldn't find any vacuum leaks. Any idea what the problem could be?
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