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Have you checked for any intake air leaks (especially if you have idle issues)? Possibly replace the PCV valve?
Sometimes faults will store even without a CEL on the dash- they may require two consistent trips in a row with faults to set the light off. Best to check for faults if you have a scan tool, or Autozone will do it for FREE
I would check for faults- due to the symptoms I would think it could be a number of things- fuel pump failing at temp, or crank speed sensor failing when it gets warmed up