What does ECU mean when displayed on a car?

[BraydenFitz]

ECU stands for Electronic-Control-Unit, also known as the vehicle computer or onboard computer. Here is an introduction to ECU: 1. Composition of ECU: The ECU is similar to a regular computer, consisting of a microprocessor (CPU), memory (ROM, RAM), input/output interfaces (I/O), analog-to-digital converters (A/D), as well as shaping, driving, and other large-scale integrated circuits. 2. Functions of ECU: It has self-diagnosis and protection capabilities. When a system failure occurs, it can automatically record the fault code in RAM and take protective measures to read substitute programs from the inherent programs to keep the engine running. At the same time, these fault messages will be displayed on the dashboard and remain lit, allowing the owner to promptly identify the issue and drive the car to a repair shop.