P0992-2-4/Od Hydraulic Pressure Test Failure
WARNING: This page is about a different car, the 2005 Jeep Liberty. However, it is still accessible from the selected car via links, so may be relevant.
When Monitored: In any forward gear with engine speed above 1000 RPM shortly after a shift and every minute thereafter.
Set Condition: After a shift into a forward gear, with engine speed >1000 RPM, the PCM momentarily turns on element pressure to the clutch circuits that don't have pressure to identify the correct pressure switch closes. If the pressure switch does not close 2 times, the DTC sets.