Electronic Pressure Control (EPC) Solenoid
WARNING: This page is about a different car, the 2002 Ford Ranger. However, it is still accessible from the selected car via links, so may be relevant.
The Electronic Pressure Control (EPC) solenoid is a Variable Force Style (VFS) solenoid. The VFS type solenoid is an electro-hydraulic actuator combining a solenoid and a regulating valve.
The Powertrain Control Module (PCM) varies the current to the EPC solenoid.
This action causes the solenoid to regulate transmission line pressure and line modulator pressure. This is done by producing resisting forces to the main regulator and line modulator circuits. These two circuits control clutch application pressures.