What does engine control system failure mean?

[AndresFitz]

Engine control system failure indicates that the ECU is damaged. The ECU is the engine's control computer, often referred to as the brain of the engine. Without the ECU, the car's engine cannot operate normally. There are many factors that can cause ECU damage, such as power circuit failure, output power module failure, memory failure, ECU water ingress, or moisture exposure. The ECU, or Electronic Control Unit, is essentially a specialized microcomputer controller for automobiles. It consists of a microprocessor, memory, input/output interfaces, analog-to-digital converters, and large-scale integrated circuits for signal conditioning and driving.