How many times has the help fault light been on for 4s, but there is still no solution?

Although there are many reasons for turning on the light, I feel that poor gasoline quality or low gasoline grade is the main reason for using low-grade gasoline, because the power age of the press engine leads to high compression ratio. I suggest that gas stations with heavy traffic should be filled with high-grade gasoline, and the car should run at high speed for a few minutes without shaking and recover within 2 days. If not, check other reasons.