FORD 2013 Explorer v.1 - Manual (Page 277)

STEERING
Electric Power Steering
WARNING: The electric power steering system has diagnostic
checks that continuously monitor the system to ensure proper
operation. When a system error is detected the following message
Service Power Steering, Service Power Steering Now or Power Steering
Assist Fault may appear in the information display.
WARNING: The electric power steering system has diagnostics
checks that continuously monitor the system to ensure proper
operation of the electronic system. When an electronic error is
detected, Power Steering Assist Fault will be displayed in the
information display. If this happens, stop the vehicle in a safe place, and
turn off the engine. After at least 10 seconds, reset the system by
restarting the engine, and watch the information display for Power
Steering Assist Fault. If the message returns, or returns while driving,
take the vehicle to your dealer to have it checked. With the message
displayed, the steering assist is turned off, making the vehicle harder to
steer.
WARNING: If Service Power Steering is displayed in the
information display, a problem with the system function has been
detected. On the next key cycle Service Power Steering Now will be
displayed and steering assist will be removed until the steering system
is serviced. Have your vehicle taken to the nearest dealer as soon as
possible.
WARNING: Obtain immediate service if a system error is
detected. You may not notice any difference in the feel of your
steering, but a serious condition may exist. Failure to do so may result
in loss of steering control.
Driving Aids 277
2013 Explorer (exp)
Owners Guide gf, 1st Printing
USA (fus)