What does the wrench symbol on the car indicate as a fault?

[DiJosiah]

When a car displays a wrench symbol, it is indicating that the vehicle requires maintenance. This wrench light serves as the car's maintenance reminder. Relevant information is as follows: 1. Maintenance cycle: Different brands and manufacturers specify different intervals. For example, most Japanese and Korean cars require maintenance every 5,000 kilometers, while European and American cars may have longer intervals, such as 7,500 kilometers, 10,000 kilometers, 15,000 kilometers, or even more. The specific details can be found in the maintenance section of the vehicle's user manual. 2. Maintenance items: Authorized service centers (4S shops) include over 20 inspection and adjustment items, such as changing the engine oil and oil filter. The maintenance tasks vary by mileage. Some items require periodic replacement (based on time or mileage intervals), such as power steering fluid, brake fluid, transmission fluid, air filter, fuel filter, brake hoses, engine belts, timing chains, and tension adjusters. Others may be replaced based on usage, wear, or corrosion, such as coolant, spark plugs, brake pads, wiper blades, and tires. Some items are replaced only when issues arise or are unpredictable, such as the battery and tie rod ends.