In this experimental investigation, synthesized Ag-Cu-Pt-Ce/cordierite monolithic catalyst were studied in order to determine low temperature catalytic activity. The catalyst was characterized by Field Emission-Scanning Electron Microscopy (FE-SEM) and x-ray Fluorescence (XRF). Selective Catalytic Reduction (SCR) performance tests with 2-propanol-toluene mixture as reductant were carried out with using exhaust gas sample of a diesel engine. NOx conversion rates were measured at various space velocities such as 20000, 30000 and 40000 h(-1) and engine loads of 1 kW, 2 kW, 3 kW and 4 kW ranging from 170 to 260 degrees C exhaust gas temperature with the intervals of 10 degrees C. The characterization analysis of catalysts showed that coating process has been performed successfully due to the well-dispersed metallic particles to catalyst surface and pores. The results also demonstrated that the NOx conversion rates increased due to the increment in exhaust gas temperature which has significant effect on catalytic activity. In conclusion, the maximum NOx conversion rate was obtained as 68.4% at the engine load of 4 kW, 20000 h(-1) and at 260 degrees C.