DTC P1452: EVAP Tank Pressure Sensor. Value Too Low When Depressurized.: Notes
WARNING: This page is about a different car, the 2003 Saab 9-3 and 2002 Saab 9-3. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: Locating EVAP Tank Pressure Sensor
Courtesy of SAAB-SCANIA OF AMERICA, INC.
Fig 2: Circuit Diagram (EVAP Tank Pressure Sensor, Value Too Low)