What is an ECU fault?

[MacJake]

ECU light on is the vehicle's onboard computer displaying a code error prompt. The following is relevant information about ECU: 1. ECU generally has self-diagnosis and protection functions. When a system failure occurs, it can automatically record the fault code in RAM and take protective measures. 2. Read the substitute program from the aforementioned inherent program to maintain engine operation. 3. At the same time, these fault messages will be displayed on the dashboard and remain on, allowing the owner to detect the problem in time and drive the car to the repair shop. 4. Although many fault phenomena of electronically controlled gasoline injection engines are related to the ECU, the actual failure rate of the ECU is extremely low. Most of the faults are caused by human factors, so do not easily suspect the ECU.