Fuel and Refueling
•
•
the fuel fill inlet may not have been
properly closed See Refueling (page
117).
Your vehicle may not pass the I/M test if
the service engine soon indicator is on or
not working properly (bulb is burned out),
or if the OBD-II system has determined
that some of the emission control systems
have not been properly checked. In this
case, your vehicle is not ready for I/M
testing.
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
If the vehicle’s engine or transmission has
just been serviced, or the battery has
recently run down or been replaced, the
OBD-II system may indicate that the
vehicle is not ready for I/M testing. To
determine if the vehicle is ready for I/M
testing, turn the ignition key to the on
position for 15 seconds without cranking
the engine. If the service engine soon
indicator blinks eight times, it means that
the vehicle is not ready for I/M testing; if
the service engine soon indicator stays on
solid, it means that the vehicle is ready for
I/M testing.
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.
The OBD-II system monitors the emission
control system during normal driving. A
complete check may take several days. If
the vehicle is not ready for I/M testing, you
may need to perform the following driving
cycle consisting of mixed city and highway
driving:
Readiness for
Inspection/Maintenance (I/M)
Testing
Drive on an expressway or highway for a
steady 15 minutes, followed by 20 minutes
of stop-and-go driving with at least four
30-second idle periods.
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.
Allow the vehicle to sit for at least eight
hours without starting the engine. Then,
start the engine and complete the above
driving cycle. The engine must warm up to
its normal operating temperature. Once
started, do not turn off the engine until the
above driving cycle is complete. If the
vehicle is still not ready for I/M testing, you
will have to repeat the above driving cycle.
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).
121
Fiesta (CCT), enUSA, Second Printing
English 
