OBD port LINCOLN MKZ 2014 Owners Manual

Please consult your warranty
information for complete details.
On-Board Diagnostics (OBD-II)
Your vehicle is equipped with an
on-board diagnostics system (OBD-II)
that monitors the engine’s emission
control system. This system protects
the environment by ensuring that your
vehicle continues to meet government
emission standards. The OBD-II
system also assists your authorized
dealer in properly servicing your
vehicle.
When the service engine
soon indicator illuminates,
the OBD-II system has
detected a malfunction. Temporary
malfunctions may cause the service
engine soon indicator to illuminate.
Examples of temporary malfunctions
are:
• the vehicle has run out of fuel—the engine may misfire or run poorly
• poor fuel quality or water in the fuel—the engine may misfire or run
poorly
• the fuel fill inlet may not have been properly closed See Refueling
(page 160).
• driving through deep water—the electrical system may be wet.
You can correct these temporary
malfunctions by filling the fuel tank
with good quality fuel, properly closing
the fuel fill inlet or letting the electrical
system dry out. After three driving
cycles without these or any other
temporary malfunctions present, the service engine soon indicator should
stay off the next time you start the
engine. A driving cycle consists of a
cold engine startup followed by mixed
city/highway driving. No additional
vehicle service is required.
If the service engine soon indicator
remains on, have your vehicle serviced
at the first available opportunity.
Although some malfunctions
detected by the OBD-II may not have
symptoms that are apparent,
continued driving with the service
engine soon indicator on can result in
increased emissions, lower fuel
economy, reduced engine and
transmission smoothness, and lead
to more costly repairs.
Readiness for
Inspection/Maintenance (I/M)
Testing
Some state/provincial and local
governments may have
Inspection/Maintenance (I/M)
programs to inspect the emission
control equipment on your vehicle.
Failure to pass this inspection could
prevent you from getting a vehicle
registration.
If the service engine soon
indicator is on or the bulb
does not work, you may need
to have the vehicle serviced. See
On-Board Diagnostics (OBD-II).
165
Fuel and Refueling