i have same engine as yours and have similar problem.

i think your car runs lean when warm but when cold it starts easily and OK because of cold start and after start enrichment.

try unplugging your OXs behind right passenger footwell if still not OK, measure voltage of EHA (5-8ma when cold with ignition on, 2-3ma first 2-8 mins in park or Neutral, 0-1 ma when warm at idle) or you can try removing the EHA but adjust AF mixture manually if it stalls after removing the EHA.