Pressure Control Solenoid

Varies the hydraulic line pressure the transmission works at, rather than switching a gear on or off. Pressure has to be matched to torque: too little and the clutches slip and burn, too much and every shift lands like a hammer. That is why a pressure control fault shows up as shift quality going wrong across all gears — harsh, slipping, or both at different loads — while shift scheduling remains correct. Usually a variable-current solenoid, so it fails progressively rather than cleanly, and its early stages are easy to mistake for a worn gearbox.

Also known as: epc solenoid, line pressure solenoid, pressure solenoid, epc, force motor, variable force solenoid, vfs

Referenced by 181 codes

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Codes involving this component (181)

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