What does 'code' mean when it appears on a car?

[AvaFitz]

Car code indicates that there is a fault in the vehicle. The specific fault code needs to be determined by connecting diagnostic equipment for inspection. Extended explanation about car faults is as follows: 1. Depending on the vehicle configuration, some models' driver information centers cannot display Chinese messages. Vehicle information will display faults as code numbers. For example, Chevrolet Cavalier code 35 means 'please replace the remote key battery,' and code 79 indicates 'insufficient engine oil, please add.' 2. Some fault codes do not necessarily indicate electronic component failure; they could also be caused by mechanical faults. 3. Among fault codes caused by mechanical issues leading to distorted signals in the electronic control system, 28 out of 86 engine fault codes fall into this category. For example, P0017 (crankshaft-camshaft position correlation fault) could result from poor-quality oil clogging oil passages, timing chain misalignment or elongation, damaged camshaft timing gear assembly, or incorrect timing marks. 4. In actual vehicle repairs, technicians primarily rely on analyzing fault symptoms and relevant data (fault codes, data streams) to identify the root cause of the problem.