This research paper aims to investigate the temperature and stress distributions in a plasma-sprayed Yttria-stabilized zirconia (YSZ) coating on an AlSi alloy piston head in order to enhance the performance of a Hyundai Creta 1.5L CRDi Engine's piston. The analysis is conducted using Ansys, a finite element-based software. The Yttria-stabilized zirconia ceramic coating, with thicknesses of 0.2 mm, 0.4 mm, and 0.6 mm, is applied on the Al-Si piston crown. The effects of coating thickness on temperature and thermal stress distributions are examined by comparing the results with those obtained from an uncoated piston using the finite element method. The analysis using Ansys facilitates improvements in thermal efficiency and a reduction in harmful emissions.