In the recent era, carbon monoxide (CO) gas leaks in vehicles are on the rise. As we know, the gas is so dangerous that it can affect our body by endangering the breathing and blood systems. The driver and the passenger due to lack of oxygen in the body. Therefore, gas leakage carries a high risk to all human beings. This project aims to solve this problem by detecting carbon monoxide gas. In addition, to make this project even more interesting, Raspberry Pi is used to control all the hardware used. Light-emitting diode (LEDs) and buzzers are used as alarm signals when the concentration of carbon monoxide gas reaches dangerous levels. Instead, a Global Positioning System (GPS) module is used to track location coordinates if carbon monoxide exceeds the danger threshold. When the gas concentration exceeds the threshold, a Blynk notification will be sent to the smartphone of the concerned person. In addition, the power window motor will roll the window down automatically when the CO gas concentration is higher than the threshold value. It will reduce the concentration of CO gas in the vehicle to prevent the toxicity of CO gas in the vehicle. This can prevent the endangered toxicity of CO gas the vehicle from being happened.