What is the reason for the engine warning light coming on after refueling with 92 gasoline?
2 Answers
The reason for the engine warning light coming on after refueling with 92 gasoline is: it indicates that the gasoline itself has quality issues. You need to go to a car repair shop or 4S store for inspection as soon as possible to avoid affecting the normal driving of the car. If necessary, replace the gasoline in the fuel tank. Gasoline is a colorless or pale yellow mobile liquid at room temperature, difficult to dissolve in water, and is a light petroleum product with large usage. It is an important fuel for car engines. According to its use, gasoline products can be divided into three types: aviation gasoline, automotive gasoline, and solvent gasoline. Aviation gasoline and automotive gasoline are mainly used as fuel for gasoline engines and are widely used in vehicles such as cars and motorcycles; solvent gasoline is used in the production of synthetic rubber, paint, etc.
After filling up with 92-octane gasoline, the check engine light came on. I've encountered this situation myself and it's quite annoying. The gasoline's octane rating might be a bit low—the car is supposed to run on 95 but got filled with 92, which can cause engine knocking (that pinging sound from incomplete combustion). The engine control unit detects this abnormality and triggers the warning light. This isn't a major issue; sometimes it goes away on its own after driving a few dozen kilometers. If not, try switching back to higher-octane fuel. Don't ignore it—prolonged use can wear out spark plugs or oxygen sensors. For daily driving, it's best not to save a few bucks by using the wrong fuel. Always check the owner's manual for recommended fuel grades first. If the light persists, visit a repair shop for a proper diagnostic scan.
