Smart Fortwo persistent engine light issue with multiple dealer visits and no resolution on Smart Fortwo

Some Smart Fortwo owners report experiencing persistent check engine light issues despite multiple dealer visits, indicating potential underlying problems. Common reasons for engine stalling reported by owners include issues with the fuel system, air intake system, or ignition system. When the check engine light illuminates, it may signal problems with various sensors, such as temperature sensors, EGR valves, or lambda sensors. Some owners find that simple solutions, like checking and tightening the fuel cap, can temporarily resolve the issue. Additionally, extreme temperatures, such as -40 degrees Celsius, can affect vehicle performance and trigger the check engine light. If dealers have been unable to resolve these issues, seeking a second opinion from another mechanic or specialized Smart car service center may be advisable, along with tracking specific circumstances that coincide with the light's activation for better diagnosis.