What does the illuminated indicator on the dashboard after engine start indicate?
2 Answers
When the light illuminates during engine start, it indicates the self-check function of the electrical system. If it remains lit after startup, it signifies a fault in a specific electronic control system. For example, if the engine fault light stays on, it means there is a fault in the engine's electronic control system, reminding you to visit a service station for inspection as soon as possible. Introduction to the self-check circuit: The self-check circuit is an additional component in the electrical system that can partially reflect the working status of the circuit. In a sense, the self-check circuit and the power indicator light are similar, but the former is more complex and powerful in functionality. Limitations of the self-check function: In reality, the self-check function has significant limitations. For instance, if there is a fault in the amplifier (output) section, the fault signal cannot be read at all, rendering the self-check meaningless. Secondly, fault signals are often simplistic, making it difficult to interpret their meaning even when they are visible.
Every time I drive, I pay attention to whether the lights on the dashboard come on after the engine starts. This indicates that the car has detected an issue during its self-check. The most common one is the low oil pressure light; if it comes on, it might mean there's not enough oil or a blockage, and failing to top it up in time could lead to piston seizure or engine failure. The battery charging light coming on could mean the alternator is faulty or the wiring is loose, possibly causing the car to stall at a red light. A constantly lit check engine light indicates an issue with the emission system, such as a faulty oxygen sensor, leading to higher fuel consumption and increased emissions. If the ABS light is on, the brake assist system is malfunctioning, making the car prone to losing control in rainy conditions. Don’t underestimate these lights—minor issues could lead to costly repairs, while major ones might cause accidents. I always advise friends to carry an OBD scanner when traveling; scanning the trouble codes with a single click can help predict the fault point, allowing early intervention to save money and ensure peace of mind. Regular maintenance of oil, water, and the battery by checking the manual is a good preventive measure to ensure safe and worry-free driving.
