Some 2021 F-150 vehicles may experience difficulty in deactivating the Brake Service Mode when following the procedure in Workshop Manual (WSM) Section 206-00. The procedure in the WSM is being updated at this time, and the correct procedure is as follows: 1) Set the ignition to ON. 2) Press and hold the accelerator pedal and place the electronic parking brake (EPB) switch in the APPLY (upward) position. Continue to hold the accelerator pedal and the electronic parking brake EPB switch. 3) Firmly press the brake pedal for at least 1 second. Release the brake pedal while continuing to hold the accelerator pedal and the EPB switch. 4) Set the ignition to OFF then set the ignition to ON within 5 seconds, then release the accelerator pedal and the EPB switch.
