The transmission pressure solenoids control the fluid pressure. Therefore, they achieve proper automatic transmission performance. The solenoids send an electrical signal to the PCM (Powertrain Control Module) based on their internal pressure. The right pressure is necessary because the transmission is controlled by belts and clutches. These change gears at the right fluid pressure at the right time.
When the DTC P2714 OBDII code is stored, it means the PCM detects the transmission pressure control solenoid “D” has a malfunction. In this case, it means it is stuck in the off position.