What Causes the Car Engine Warning Light to Illuminate?
2 Answers
Car engine warning light illuminates due to unclean engine cylinders, poor combustion state, and low-quality fuel. The specific details are as follows: Unclean engine cylinders with carbon deposits: Over time, the engine interior will inevitably accumulate carbon deposits. These deposits alter the engine's design parameters and are thermally unstable, retaining heat that can cause engine knocking without ignition. In such cases, the engine warning light will turn on. Timely engine cleaning is the solution. Poor combustion state: Poor combustion is a primary reason for the engine warning light. In automotive design, oxygen sensors are installed to monitor the engine's combustion state, ensuring optimal performance and longevity. Poor combustion not only pollutes the environment but also leads to fuel wastage and excessive engine wear. Solution: Install an oxygen sensor. Low-quality fuel: Engines have specific requirements for gasoline quality, especially as engine demands increase, necessitating higher fuel standards. The solution is to use higher-quality gasoline.
Last time my car's engine light came on and it really freaked me out. I rushed to the auto repair shop where the experienced mechanic checked it and said there are usually three common issues: either the exhaust system is clogged with too much carbon buildup in the catalytic converter; or the spark plugs are worn out causing ignition problems, which you can feel as jerky acceleration; or the oxygen sensor got damaged by poor fuel quality. This light is actually called the MIL (Malfunction Indicator Lamp), specifically monitoring the emissions system - never ignore it when it lights up. I learned this the hard way by assuming it was a false alarm, only to see my fuel consumption skyrocket two weeks later, costing me an extra 2,000 yuan in repairs. The safest approach is to buy an OBD scanner to plug into the port under the steering wheel and read the trouble codes, or at least drive to a professional shop for diagnosis immediately.
