Present study exploring the influence of Dufour effect on a non-linear heat and mass transfer flow past a stretching/shrinking sheet prescribed with variable heat flux in the presence of heat source and constant suction. The fluid viscosity and thermal conductivity are assumed to be inverse linear functions of temperature. A numerical solution for the system of non-linear momentum, energy and concentration equations are worked out by adopting Runge-Kutta shooting method. The consequences of both viscosity and thermal conductivity parameters along with Dufour number and Magnetic parameter on the flow are presented and discussed graphically.