Electric Power Steering Module

This procedure covers the removal and replacement of the Electric Power Steering (EPS) module on 2015-2020 Ford F-150 trucks with the 5.0L Coyote V8 engine.

Warnings

Tools required

Parts

• Electric Power Steering Module × 1 — Use OEM Ford or quality aftermarket

Preparation

1. Park vehicle on level ground and apply parking brake
2. Turn steering wheel to center position and note wheel alignment before beginning work
3. Disconnect negative battery terminal and wait 2 minutes for airbag system to discharge
4. Remove lower steering column cover panels using trim tools to access steering shaft coupling

Procedure

1. 1

   Access steering shaft coupling
   From inside the cab, locate the steering shaft coupling where the column meets the intermediate shaft. Remove the lower dash trim panels as needed for access. Mark the relationship between the upper and lower shaft with paint or a marker for reassembly alignment.
2. 2

   Disconnect steering shaft coupling
   Remove the coupling bolt that connects the steering column shaft to the intermediate shaft. Use a 13mm socket and carefully support the shaft as you remove the bolt. Separate the coupling by sliding the shafts apart. Do not rotate the steering wheel from this point forward.
   ⚠Do not allow the steering wheel to rotate once shaft is disconnected to prevent clockspring damage.
3. 3

   Access EPS module from engine bay
   Move to the engine bay. Locate the EPS module mounted on the steering rack assembly on the driver side of the firewall. Remove any heat shields or covers that restrict access to the module using appropriate sockets.
4. 4

   Disconnect EPS electrical connector
   Locate the main electrical connector on the EPS module. Press the locking tab and carefully disconnect the connector. Inspect the connector pins for corrosion or damage. Clean if necessary with electrical contact cleaner.
5. 5

   Remove EPS module mounting bolts
   Remove the mounting bolts securing the EPS module to the steering rack housing. There are typically 3-4 bolts depending on the specific rack configuration. Use a 13mm socket and support the module as you remove the final bolt.
   ⚠The EPS module weighs approximately 15-20 lbs. Support it properly during removal to prevent dropping.
6. 6

   Remove EPS module from vehicle
   Carefully maneuver the EPS module away from the steering rack. It may require slight rotation or angling to clear surrounding components. Note the orientation and position of any alignment pins or guides for installation of the new module.
7. 7

   Prepare new EPS module
   Remove the new EPS module from packaging. Verify part number matches the old unit. Transfer any brackets or hardware if they were not included with the new module. Apply a small amount of dielectric grease to the electrical connector on the new module.
8. 8

   Install new EPS module
   Position the new EPS module onto the steering rack, ensuring any alignment pins are properly seated. Align the module with the mounting bolt holes. Start all mounting bolts by hand before tightening any of them to ensure proper alignment.
9. 9

   Torque EPS module mounting bolts
   Using a torque wrench, tighten the mounting bolts in a cross-pattern to ensure even seating of the module. This prevents stress on the housing and ensures proper module alignment.
10. 10

    Reconnect electrical connector
    Plug the main electrical connector into the new EPS module until you hear and feel a positive click. Gently tug on the connector to verify it is fully locked. Ensure no pins are bent or misaligned.
11. 11

    Reinstall covers and heat shields
    Replace any heat shields or covers that were removed for access to the EPS module. Ensure they are properly seated and secured to prevent rattles or interference.
12. 12

    Reconnect steering shaft coupling
    From inside the cab, align the marks made during disassembly on the steering shaft coupling. Slide the shafts together and insert the coupling bolt. Ensure the splines are fully engaged before tightening.
13. 13

    Reinstall interior trim panels
    Replace all lower steering column covers and dash trim panels removed during disassembly. Ensure all clips are properly seated and panels fit flush.
14. 14

    Reconnect battery and initialize system
    Reconnect the negative battery terminal. Turn the ignition to the ON position without starting the engine. The EPS system will perform a self-test. The power steering warning light should illuminate briefly then extinguish. If it remains on, verify all connections before proceeding.

Reassembly

1. Verify the steering wheel is still centered and aligned with the front wheels in the straight-ahead position
2. Confirm all trim panels are properly secured and there are no loose fasteners
3. Double-check that the EPS electrical connector is fully seated and locked

Verification

• Start the engine and verify the power steering warning light is off
• Turn the steering wheel lock-to-lock while stationary and listen for unusual noises from the EPS system
• Test drive the vehicle at low speed and verify steering assist is functioning normally with no heavy steering feel
• Scan for diagnostic trouble codes using an OBD-II scanner to ensure no EPS-related codes are present
• Verify steering returns to center properly after turns
• Check that there are no warning lights on the instrument cluster related to the steering system

Related trouble codes on this vehicle

Codes that commonly send this job to the bay — tap one for symptoms, causes, and diagnostic steps.

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