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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.
Stability Control System
Displays when the AdvanceTrac®/Traction control is active. If
the light remains on, have the system serviced immediately.
Stability Control System Off
Illuminates when AdvanceTrac®/Traction control has been
disabled by the driver.
Transmission Tow/Haul (if equipped)
Illuminates when the Tow/Haul feature has been activated.
Refer to the Transmission chapter for transmission function
and operation. If the light flashes steadily, have the system
serviced immediately, damage to the transmission could occur.
104 Instrument Cluster
2015 Navigator (nav)
Owners Guide gf, 1st Printing, July 2014
USA (fus)
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