* Suspension travel sensors: These sensors, often incorporated into the struts or shocks, measure the suspension's travel (how far it compresses and extends). These are *indirectly* contributing to ride height determination. Their locations vary depending on whether the Expedition has a standard or air suspension.
* Control module: This electronic control module receives data from the travel sensors (and potentially other inputs) and calculates the ride height. It's usually located inside the vehicle, somewhere under the dash or in the center console area, though the exact location varies by year and trim.
In short: There's no single "ride height sensor" to point to. The system uses information collected by various parts integrated into the suspension to calculate height. To diagnose ride height issues, you'll need a scan tool capable of reading the suspension control module's data. A mechanic will have the proper tools and expertise to identify problems within this system.
