  We present results of a search for CP violation in B0B0bar mixing with the
BABAR detector. We select a sample of B0-->D*-Xl+ nu decays with a partial
reconstruction method and use kaon tagging to assess the flavor of the other B
meson in the event. We determine the CP violating asymmetry
  ACP = (N(B0B0) - N(B0bar B0bar))/(N(B0B0) + N(B0bar
B0bar))=(0.06+-0.17+0.38-0.32)%, corresponding to delta_CP =1 - |q/p|
=(0.29+-0.84+1.88 -1.61)*10^-3.
