I received this truck with the complaints of rough running and black smoke intermitently and mil on all the time. Codes were : P0131 O2 low bk1 sens1 P0171 lean bk1 sens1 P0172 rich bk1 sens1 P0175 rich bk2 sens1 P0300 random misfire P0430 cat efficiency low b... Login to read more.