Cadillac ATS Owner's Manual page 123

122 Instruments and Controls
Malfunctions are often indicated by
the system before any problem is
noticeable. Being aware of the light
and seeking service promptly when
it comes on may prevent damage.
Caution
If the vehicle is driven continually
with this light on, the emission
control system may not work as
well, the fuel economy may be
lower, and the vehicle may not
run smoothly. This could lead to
costly repairs that might not be
covered by the vehicle warranty.
Caution
Modifications to the engine,
transmission, exhaust, intake,
or fuel system, or the use of
replacement tires that do not
meet the original tire
specifications, can cause this light
to come on. This could lead to
costly repairs not covered by the
(Continued)
Caution (Continued)
vehicle warranty. This could also
affect the vehicle s ability to pass
an Emissions Inspection/
Maintenance test. See
Accessories and Modifications
0 291.
If the light is flashing : A
malfunction has been detected that
could damage the emission control
system and increase vehicle
emissions. Diagnosis and service
may be required.
To help prevent damage, reduce
vehicle speed and avoid hard
accelerations and uphill grades.
If towing a trailer, reduce the
amount of cargo being hauled as
soon as possible.
If the light continues to flash, find a
safe place to park. Turn the vehicle
off and wait at least 10 seconds
before restarting the engine. If the
light is still flashing, follow the
previous guidelines and see your
dealer for service as soon as
possible.
If the light is on steady : A
malfunction has been detected.
Diagnosis and service may be
required.
Check the following:
For vehicles without the capless
fuel system, a loose or missing
fuel cap may cause the light to
come on. See Filling the Tank
0 280. A few driving trips with
the cap properly installed may
turn the light off.
For vehicles with the capless
fuel system, if fuel has been
added to the vehicle using the
capless funnel adapter, make
sure that it has been removed.
See Filling the Tank with a
Portable Gas Can under Filling
the Tank 0 280. The diagnostic
system can detect if the adapter
has been left installed in the
vehicle, allowing fuel to
evaporate into the atmosphere.