Generic
Type:
    Powertrain - Transmission - ISO/SAE Controlled
Description:
    Pressure Control Solenoid "A"

GM
Type:
    Powertrain - Transmission - ISO/SAE Controlled
Description:
    Pressure Control Solenoid - Pressure Low Conditions
Cause:
    Engine running, then the PCM detected, once per vehicle trip, that DTC P0731, P0732, P0733 and P0734 were set (no forward gears are allowed if these codes are set)

Nissan
Type:
    Powertrain - Transmission - ISO/SAE Controlled
Description:
    AT - Line pressure solenoid - voltage low
Cause:
    Wiring, pressure solenoid, TCM