A/C Refrigerant Pressure Sensor: L61/2.2L
WARNING: This page is about a different car, the 2007 Saturn Vue. However, it is still accessible from the selected car via links, so may be relevant.
A/C high side pressure is more than 2945 kPa (427 psi). The clutch will be enabled after the high side pressure decreases to less than 2069 kPa (300 psi). A/C low side pressure is less than 210 kPa (31 psi). The clutch will be enabled after the low side pressure increases to more than 258 kPa (37 psi).