What is the reason for the wrench icon appearing on the dashboard?

[MacJace]

The reason for the wrench icon appearing on the dashboard is to remind the owner that the vehicle needs maintenance. The maintenance includes: 1. Changing the engine oil and oil filter, cleaning the air filter, and checking whether the generator belt and wiper blades are damaged; 2. Checking whether the levels of various fluids are normal; 3. Checking whether the tire pressure is normal and whether there is any uneven wear, bulging, or damage to the tires; 4. Inspecting the vehicle's chassis, including checking for scratches on the brake pads, brake discs, connecting rods, ball joints, and CV joints; 5. Checking whether all switches and lights in the vehicle are working properly. The precautions for vehicle maintenance are: 1. Make an appointment in advance; 2. Record any faults or questions encountered while driving and inform the staff during the maintenance registration.