You should be able to find two ports, may have a red and blue, or both black but two diffrent sizes, generaly high pressure is by the compressor, and low pressure is bt the condencer (by the radiator)the bigger of the two is low pressure, the smaller of the two is high pressure.
Low or no refrigerant Blown Fuse Defective pressure switch Bad clutch on compressor Selector switch
The 2000 Pontiac Bonneville air conditioning compressor low pressure port is located on the bottom of the compressor. You can recharge your cooling system through the low pressure port.
It's under the compressor off the lower rad hose
The AC recharge port on a 2000 Saturn LS is located in the engine compartment. Specifically, it can be found on the larger diameter aluminum line that runs between the compressor and the condenser. Look for a fitting that is typically capped; it may be near the front of the engine bay, close to the driver's side. Be sure to identify the low-pressure port, which is used for recharging the system.
Its included in the fuel filter 98-02
You have a cycling clutch compressor. Turn the AC on max, let the car for five minutes or so, go look at the compressor. You should see the clutch engaging and disengaging the compressor as the pressure builds and drops.
Follow A/C lines from compressor - Larger is low pressure Could be by passenger firewall near drier Follow A/C lines from compressor - Larger is low pressure Could be by passenger firewall near drier
Possibly the pressure cycling switch.
The 2000 Acura air conditioner low pressure service port can be found on the top of the air conditioner compressor. The low pressure service port will have a blue top.
Behind the air contitioning compressor on the block next to the oil filter.
30 Front 30 Rear http://www.firestonecompleteautocare.com/tires/pressure.jsp
Trouble code P0122 means:Throttle position or pedal position sensor/switch circuit,low input