Air Suspension Valve Block

This procedure covers the replacement of the air suspension valve block (manifold) on 2015-2020 Ford F-150 vehicles equipped with the factory air suspension system.

Warnings

Tools required

Parts

• Air suspension valve block assembly × 1 — Use OEM Ford part
• Air line O-rings × 1 — Usually included with valve block
• Push-to-connect air line fittings (if damaged) × 1 — Use OEM specification

Preparation

1. Park vehicle on level ground and engage parking brake
2. Place wheel chocks in front of front wheels
3. Connect OBD-II scan tool and access air suspension menu
4. Disable air suspension system through scan tool (Service Mode or Disable function)
5. Turn ignition off and disconnect negative battery terminal
6. Allow air suspension to depressurize for at least 5 minutes
7. Raise rear of vehicle and support securely on jack stands at frame rails

Procedure

1. 1

   Remove rear passenger wheel
   Loosen the wheel lug nuts while vehicle is on ground. Raise the rear passenger side and support securely. Remove the wheel completely to access the valve block area.
   Torque spec

   Wheel Lug Nuts156 Nm (115 lb-ft)
2. 2

   Remove inner fender liner access panel
   Locate the plastic inner fender liner on the rear passenger side. Remove the plastic push pins and fasteners securing the rear section of the liner. Fold or remove the section to expose the frame rail area where the valve block is mounted. You may only need to partially remove the liner for access.
3. 3

   Locate and inspect valve block assembly
   The valve block is mounted to the frame rail with a bracket, typically near the rear shock tower area. Identify all air line connections (usually 4-6 lines) coming from the compressor, reservoir, and individual air springs. Note the orientation and connection positions before removal.
   ℹ️Take photos of the air line routing and connections before disconnecting to ensure correct reassembly.
4. 4

   Disconnect electrical connector
   Locate the electrical connector on the valve block assembly. Press the locking tab and carefully pull the connector straight off the valve block. Ensure the connector is secured away from the work area to prevent damage.
5. 5

   Disconnect air lines from valve block
   Working one line at a time, press the release collar on each push-to-connect fitting while pulling the air line straight out. Do not twist or bend the lines excessively. If lines are stuck, use a small flathead screwdriver to carefully depress the collar further. Mark each line position if not already documented.
   ⚠Air lines may release residual pressure. Wear safety glasses and keep face away from fittings during disconnection.
6. 6

   Remove valve block mounting hardware
   Remove the mounting bolts securing the valve block bracket to the frame rail. The valve block is typically held by 2-3 bolts. Support the valve block while removing the final bolt to prevent it from falling.
   Torque spec

   Mounting Bolts31 Nm (23 lb-ft)
7. 7

   Remove valve block assembly
   Carefully maneuver the valve block assembly out of the mounting area. Be mindful of sharp edges on the frame and any remaining wire harness clips. Inspect the mounting bracket for damage or corrosion. Clean the mounting surface on the frame rail if corroded.
8. 8

   Prepare new valve block
   Unpack the new valve block assembly and compare it to the old unit to verify correct part. Inspect all ports and fittings for damage or debris. If new O-rings are provided separately, install them on each air line fitting port. Apply a small amount of clean air suspension system-approved lubricant to the O-rings if specified by manufacturer.
9. 9

   Install new valve block assembly
   Position the new valve block in the mounting bracket and align with the frame rail mounting holes. Install the mounting bolts finger-tight first to ensure proper alignment, then torque to specification. Ensure the valve block is oriented correctly with ports accessible for air line connection.
   Torque spec

   Mounting Bolts31 Nm (23 lb-ft)
10. 10

    Reconnect air lines
    Using your reference photos or notes, reconnect each air line to the correct port on the valve block. Push each line firmly into the fitting until you hear and feel a click. Pull gently on each line to verify it is fully seated and locked. Ensure no lines are kinked, twisted, or rubbing against sharp edges.
    ⚠Incorrect air line routing can cause system malfunction or air spring failure. Verify each connection matches your documentation.
11. 11

    Reconnect electrical connector
    Plug the electrical connector back onto the valve block firmly until the locking tab clicks into place. Gently tug the connector to verify it is secure. Ensure the wiring harness is properly routed and secured with any factory clips.
12. 12

    Reinstall inner fender liner
    Reposition the inner fender liner section and secure it with all original push pins and fasteners. Ensure the liner is not pinching any wiring or air lines.
13. 13

    Reinstall wheel and lower vehicle
    Mount the rear passenger wheel and hand-tighten the lug nuts in a star pattern. Lower the vehicle until the tire just touches the ground. Torque the wheel lug nuts to specification in a star pattern. Fully lower the vehicle and remove jack stands.
    Torque spec

    Wheel Lug Nuts156 Nm (115 lb-ft)
14. 14

    Reconnect battery and initialize system
    Reconnect the negative battery terminal. Turn the ignition to the ON position (do not start engine). Using the OBD-II scan tool, exit service mode and re-enable the air suspension system. The system should begin self-leveling. Monitor for any fault codes.
15. 15

    Perform system test and leak check
    Start the engine and allow the air suspension system to complete its initialization cycle. The compressor should run and the vehicle should rise to normal ride height. Use the scan tool to command each corner up and down individually to verify valve block operation. Listen for air leaks at all connections. Spray soapy water on connections if available to check for bubbles indicating leaks.
    ⚠If any leaks are detected or fault codes are present, immediately disable the system and re-inspect all connections before driving.

Reassembly

1. Ensure all air line connections are fully seated and locked with no kinks or damage
2. Verify all mounting hardware is torqued to specification
3. Confirm inner fender liner is properly secured and not interfering with any components
4. Double-check that the electrical connector is fully engaged and locked

Verification

• Use OBD-II scan tool to verify no air suspension fault codes are present
• Confirm vehicle rises to correct ride height after system initialization
• Test all suspension height modes (normal, off-road, etc.) if equipped to verify valve operation
• Perform leak test at all air line connections using soapy water solution
• Road test vehicle and verify normal suspension operation, proper ride height, and no warning lights
• Re-check all connections after 50-100 miles of driving

Related trouble codes on this vehicle

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