What are the manifestation types of car faults?

[OLucy]

Car faults can manifest in various ways, including abnormal noises, abnormal working performance, and fluid leaks. Below is an introduction to car fault knowledge: 1. Abnormal car noises: As the car's usage time increases, improper operation, maintenance quality, and environmental factors can cause components to wear, break, loosen, age, have poor contact, short circuits, or open circuits. These issues result in noises beyond standard levels, such as knocking sounds, high-speed whistling, part rubbing sounds, or gear grinding noises. Approximately 70% of car faults are indicated through abnormal noises. Therefore, identifying general patterns and characteristics from these most intuitive manifestations can greatly facilitate car fault diagnosis. 2. Abnormal working performance: Abnormal working performance is a relatively common fault phenomenon, such as difficulty starting, automatic stalling, generator failure, difficulty shifting gears, steering failure, or brake failure.