What is the reason for the SYS warning light in a car?

[DelGabrielle]

The SYS warning light on the car dashboard indicates a minor fault in the engine system. It is generally caused by abnormal air intake or ignition issues. Below are the hazards of irregular car maintenance: 1. Clogged air filter: A blocked or excessively dirty air filter can cause poor engine air intake, allowing large amounts of dust to enter the cylinders. This accelerates carbon buildup in the cylinders, leading to poor ignition, reduced power, and naturally increased fuel consumption. 2. Increased sludge: There are many reasons for sludge buildup at the valves, including carbon deposits formed from fuel combustion exhaust at the throttle body, as well as impurities not filtered by the air cleaner that accumulate at the throttle body. Excessive sludge can cause air intake resistance, leading to increased fuel consumption.