Have a 2001 Hyundai/auto/4 cyl/ in the past years I always had a problem with the check eng lite going on after she would fill it.Tight gas cap etc.Would erase the code with my ob2 reader and it would be fine till she went back and out gas in.Now in the past month or so it on and will not go away but for a few moments.Getting code p1143 with is not in her or Haynes manual.
Does anyone think that if I replace the purge selonoid this would take care of the problem or do you have any other idea's.It failed inspection even after I erased the code then came back on.
Mass emmissions.

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