What does it mean when the ECAS warning light is on?

[LeJosiah]

ECAS malfunction indicates a fault in the air suspension system that requires repair. Below is an introduction to ECAS-related content: Air Suspension System: The electronically controlled air suspension system (ECAS) for buses/trucks consists of an ECAS electronic control unit, solenoid valves, height sensors, air springs, and other components. The height sensors are responsible for detecting changes in vehicle height. The electronic control unit receives input information, determines the current vehicle status, and activates the solenoid valves to regulate inflation/deflation of each air spring. ECAS: Introduction to ECAS The traditional air suspension control mode uses mechanical height valves, which maintain constant vehicle ride height by adjusting air spring inflation/deflation through the opening of height valves.