What does the check suspension light mean on the ford expedition?

The check suspension light illuminating on the Ford Expedition indicates that the optional air suspension system You have on Your vehicle has a problem that the engine control module has flagged. Some common issues that You'll notice in tandem here is that Your Ford's riding lower than normal, which is a tell-tale sign here, and it's because the air suspension compressor's failing. Additionally, You may hear abnormal noises during operation, or find the compressor doesn't turn on at all. To reset the system, turn the ignition to the ON position and close all the doors. Clear the warnings using the touchscreen and then select the SETUP control function. Select AIR SUSPENSION and then press the RESET control to toggle it off and then back on, which should remove the check light, if there isn't a true consistent problem. Otherwise, You'll need to address what's triggering the warning.