What does an exclamation mark inside a square box mean?

[GarrettFitz]

A square box with an exclamation mark inside indicates a vehicle fault, which is a common fault warning light. Common vehicle warning lights include: 1. Engine: The engine fails to start, mainly due to reasons such as checking whether the distributor, spark plugs, and high-voltage lines are dampened by rain or car washing. Check whether the battery voltage is sufficient. 2. Gear shifting: The vehicle stalls during gear shifting, mainly due to reasons such as the engine idle speed being too low; the idle cutoff valve not being tightened properly, or the plug falling off. 3. Steering wheel: The steering wheel shakes while driving, mainly due to reasons such as whether there are mud, stones, or other debris stuck on the vehicle tires; the tires being deformed after impact or the wheel balance weights falling off; or not performing a four-wheel alignment after replacing the tires.