DTC P1250 - Pressure Regulator Control (PRC) Solenoid Valve Malfunction: Condition

WARNING: This page is about a different car, the 1997 Mazda Millenia. However, it is still accessible from the selected car via links, so may be relevant.

DTC is set when open or short circuit is detected in PRC solenoid valve when ignition is on. Possible causes are:

PRC solenoid valve malfunction.
Open or short circuit between terminal "A" on PRC solenoid valve and main relay.
Open or short circuit between terminal "B" on PRC solenoid valve and terminal No. 2R on Engine Control Module (ECM).