Ford 2013 Explorer Owner's Manual page 115

Low washer fluid (RTT)
Illuminates when the windshield washer fluid is low.
Powertrain malfunction/reduced power
Illuminates when a powertrain or an 4WD fault has been
detected. Contact your authorized dealer as soon as possible.
Safety belt
Reminds you to fasten your safety belt. A Belt-Minder chime
will also sound to remind you to fasten your safety belt.
Service engine soon
The service engine soon indicator light illuminates when the
ignition is first turned to the on position to check the bulb and
to indicate whether the vehicle is ready for
Inspection/Maintenance (I/M) testing. Normally, the "service engine soon"
light will stay on until the engine is cranked, then turn itself off if no
malfunctions are present. However, if after 15 seconds the "service
engine soon" light blinks eight times, it means that the vehicle is not
ready for I/M testing. See the Readiness for inspection/maintenance
(I/M) testing in the Fuel and Refueling chapter.
Solid illumination after the engine is started indicates the on-board
diagnostics system (OBD-II) has detected a malfunction. Refer to
On-board diagnostics (OBD-II) in the Fuel and Refueling chapter. If
the light is blinking, engine misfire is occurring which could damage your
catalytic converter. Drive in a moderate fashion (avoid heavy acceleration
and deceleration) and have your vehicle serviced immediately by your
authorized dealer.
WARNING: Under engine misfire conditions, excessive exhaust
temperatures could damage the catalytic converter, the fuel
system, interior floor coverings or other vehicle components, possibly
causing a fire.
2013 Explorer (exp)
Owners Guide gf, 2nd Printing
USA (fus)
Instrument Cluster 115