For 1990-2009 cars

### Removal Procedure

1. Remove the air cleaner cover and duct assembly. Refer to Air Filter Element Replacement in Engine Controls.
2. Disconnect the electrical connector from the A/C pressure sensor.
3. Remove the A/C pressure sensor from the liquid line.

### Installation Procedure

1. Using a lint-free clean, dry cloth, carefully clean the sealing surfaces of the liquid line fitting.
2. Lightly coat the new O-ring seal with mineral base 525 viscosity refrigerant oil.

Important: DO NOT allow any of the mineral base 525 viscosity refrigerant oil on the new O-ring seal to enter the refrigerant system.

3. Install the new O-ring seal.

Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

4. Install the A/C pressure sensor to the liquid line.

Tighten
Tighten the switch to 5 N·m (44 lb in).

5. Connect the electrical connector to the A/C pressure sensor.
6. Install the air cleaner and duct assembly. Refer to Air Filter Element Replacement in Engine Controls.