What does it mean when 'code' is displayed in the car?

[VonLincoln]

When 'code' is displayed in the car, it indicates that there is a fault with the vehicle. The specific fault code can only be determined by connecting diagnostic equipment for inspection. For example, in the Chevrolet Cavalier, 'code35' means 'please replace the remote key battery,' and 'code79' indicates 'insufficient engine oil, please add.' Depending on the vehicle model and configuration, some models' driver information centers cannot display messages in Chinese, and vehicle information will be shown as 'code' to indicate faults. Not all fault codes necessarily indicate damaged electronic components; some may be caused by mechanical failures. Due to mechanical reasons leading to distorted signals in the electronic control system, out of 86 engine fault codes, 28 fall into this category.