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a/f correction

  1. Problems & DIY Maintenance
    I have a completely stock 2012 2.5L MTX Outback with about 200k miles. I have had a P0171 code that shows up when idling for longer periods (more than 3 mins). I did recently replace the MAF, Front O2 sensor, and PCV since I am around 100k since last replaced and it was the first suggestions...