This procedure covers the replacement of the AC pressure sensor on a 2015-2020 Ford F-150 with 5.0L V8 engine, located on the AC suction line near the firewall.

Warnings

Tools required

Parts

• AC pressure sensor × 1 — Use OEM specification
• AC line fitting O-rings × 2 — Use OEM specification

Preparation

1. Park vehicle on level surface and engage parking brake
2. Ensure engine is completely cold to the touch
3. Verify AC system has been evacuated of refrigerant (if not, take to certified technician for evacuation)
4. Disconnect negative battery terminal and wait 2 minutes
5. Gather all tools and new parts

Procedure

1. 1

   Locate AC pressure sensor
   Open hood and locate the AC pressure sensor on the passenger side of the engine bay. The sensor is mounted on the larger diameter AC suction line near the firewall, approximately 12 inches from the AC compressor. It has a single electrical connector and threads into the line.
2. 2

   Disconnect electrical connector
   Press the locking tab on the AC pressure sensor electrical connector and pull straight away from the sensor. Use a flathead screwdriver to gently pry the connector lock tab if needed. Set the wiring harness aside.
3. 3

   Remove old AC pressure sensor
   Using a 1/4 inch ratchet with appropriate socket (typically 13mm or 15mm depending on sensor model), loosen and remove the AC pressure sensor by turning counterclockwise. Work carefully to avoid cross-threading or damaging the AC line port. Remove the old O-ring from the line fitting port.
4. 4

   Inspect AC line port
   Examine the threaded port on the AC line for any damage, debris, or metal shavings. Clean the port and surrounding area with a clean shop towel. Check that the port threads are intact and not damaged.
5. 5

   Prepare new sensor
   Remove new AC pressure sensor from packaging. Install a new O-ring onto the sensor fitting. Apply a thin coat of clean PAG oil (compatible with R-134a or R-1234yf refrigerant as applicable) to the O-ring to ensure proper seal and ease installation.
6. 6

   Install new AC pressure sensor
   Thread the new AC pressure sensor into the AC line port by hand, turning clockwise. Ensure it threads smoothly without resistance. Once hand-tight, use torque wrench to tighten to specification. Do not over-tighten as this can damage the sensor or AC line.
   Torque spec

   AC Line Fittings20 Nm (15 lb-ft)
7. 7

   Reconnect electrical connector
   Align the electrical connector with the AC pressure sensor terminal and push firmly until the locking tab clicks into place. Verify the connection is secure by gently tugging on the connector.
8. 8

   Reconnect battery
   Reconnect the negative battery terminal. Ensure connection is clean and tight.

Reassembly

1. No disassembly was required for this procedure beyond the sensor itself
2. System is ready for AC recharge by certified technician

Verification

• Have AC system recharged and vacuumed by certified technician with proper equipment
• Start engine and turn AC to maximum cold setting
• Verify AC compressor engages and system cools properly
• Check for refrigerant leaks around the new pressure sensor using leak detector
• Use scan tool to verify AC pressure sensor readings are within normal range (typically 30-45 PSI at idle with AC on)
• Verify no AC-related diagnostic trouble codes are present

More procedures for this vehicle