1. Burning condition is not good
The good combustion condition of the engine is the main reason for the engine fault light to illuminate. Based on the design of the car, in order to ensure that the engine is in a good working condition and ensure the stable working life of the engine, an oxygen sensor is designed and installed on the engine to monitor the combustion status of the engine, as long as the combustion status is good, such as hydrocarbon (HC) content is very low Carbon monoxide (CO) content is very low, nitrogen oxide (NO) content is very low, these are good combustion conditions, not only pollute the environment, but also cause fuel waste and excessive engine wear.
Exceeding each indicator in turn means:
Hydrocarbons (HC): non-combustible fuel components;
Carbon monoxide (CO): an incompletely combusted fuel oil component, which has relatively little damage to human health, and carbon monoxide poisoning can cause human death;
Nitrogen oxides (NO): Generated at such a low temperature inside the engine, which indicates that the engine wear is intensified and it will pollute the environment in the atmosphere.
2 engine knock
The engine also has a dedicated knock sensor that monitors engine knock. Engine knock has meant that it may cause minor engine damage or slight power loss. Under normal circumstances, knocking is divided into sensible knocking and non-sensing knocking. In the case of non-sensing knocking, the engine computer will adjust the engine control parameters based on the monitored conditions to avoid getting smaller and smaller. Adverse effects, but if the non-sensing knock has exceeded the range that can be adjusted by the engine computer, the engine fault light will also light up and alarm.