What are the causes of engine failure in Qin Plus DM-i?

[LaJoel]

Here are the specific reasons for engine failure in Qin Plus DM-i: 1. Irregular maintenance: About 50% of engine failures are caused by poor maintenance. 2. Incomplete combustion: Poor engine combustion state is the main reason for the engine warning light to illuminate. In automotive design, oxygen sensors are installed to monitor the engine's combustion state, ensuring optimal working conditions and normal engine lifespan. When combustion is poor—such as high levels of hydrocarbons, carbon monoxide, or nitrogen oxides—it not only pollutes the environment but also leads to fuel waste and excessive engine wear. 3. Engine knocking: The engine is equipped with a dedicated knock sensor to monitor knocking. Engine knocking can potentially cause severe mechanical damage or significant power loss. Typically, knocking is categorized into detectable and undetectable knocking. In cases of undetectable knocking, the engine control unit adjusts parameters to mitigate adverse effects. However, when undetectable knocking exceeds the adjustable range of the engine control unit, the engine warning light will activate as an alert.