How to Reset the Engine Malfunction Light?
2 Answers
Methods to reset the engine malfunction light: 1. Disconnect the negative terminal of the engine battery, wait for 30 seconds, and then reconnect it; 2. Visit a 4S shop for inspection. An engine is a machine capable of converting other forms of energy into mechanical energy, and it is suitable for power generation devices. The principles of engine and combustion include: 1. Internal combustion engine: Fuel burns inside the engine; 2. External combustion engine: Fuel burns outside the engine; 3. Gas turbine: Combustion produces high-pressure gas, which is used to rotate the turbine blades; 4. Jet engine: An engine that directly generates reactive thrust by the high-speed airflow ejected from the nozzle.
This has happened to me a few times. When the engine light comes on, don't panic and rush to clear the code—the key is to find the cause. The simplest way is to buy an OBD scanner yourself and plug it into the port under the steering wheel to read the fault code. If it's something like P0420, related to the catalytic converter or oxygen sensor, it might be due to fuel quality or a dirty sensor. Disconnecting the negative battery terminal for a few minutes to reset it can sometimes turn off the light. If it's an oxygen sensor fault code, driving a few dozen kilometers might also make it go away on its own. But if the light comes on frequently, especially with symptoms like black smoke, misfiring, or shaking, you definitely need to go to a repair shop. They'll use professional diagnostic tools to check dynamic data streams and see if it's due to flooded spark plugs, a clogged throttle body with carbon buildup, or a vacuum leak. Last time, my light came on after using cheap fuel, but after switching to two tanks of 95 and driving on the highway, the light went off on its own. The main point is, don't cover the light with tape—it'll just delay fixing the real issue.
