This research was carried out to determine the appropriate range of sensing temperature and pressure of the injection mold system of the cooling fan for electronic chips of an electric vehicle. The advanced product quality planning (APQP) method and the Taguchi method were adopted following the measurement system analysis (MSA) of the International Organization for Standardization’s (ISO) technical specification (TS) (ISO/TS16949) and a production part approval process (PPAP) considering the chemical and mechanical properties of PBT-4130 as the material for the production of the cooling fan. In molding the cooling fan, time, temperature, and pressure are important factors. Thus, melt temperature, holding pressure, holding time, volume–pressure (V–P) point, melt injection, and cooling time in the injection mold process were investigated. Each factor was experimented with to find the optimal parameters at three different levels in the injection molding process. The result showed that the holding times of the melt at the holding pressures of 45, 55, and 65 MPa, melt temperature of 265 °C, and cooling time of 30 s were important for the production of the cooling fan. The precise and accurate sensing and control of temperatures and pressures were found to be critical for an injection mold system to manufacture high-quality products for machines or equipment. The results of this research provide important information and a basis for the appropriate use of sensors in designing an injection mold system for high-precision and high-quality plastic products such as cooling fans for electric vehicles.