Where is the electronic pressure control circuit or EPC located on a 2000 ford expedition?

The Electronic Pressure Control (EPC) solenoid on a 2000 Ford Expedition is integrated into the Transmission Control Module (TCM). It's not a separate, easily identifiable component like a relay or sensor. The TCM itself is typically located inside the vehicle, often under the center console or near the passenger side of the transmission. You won't find an EPC "circuit" as a standalone unit; it's a function controlled by the TCM's internal circuitry. To access it, you'd need to remove the TCM for repair or replacement by a qualified technician.