Cadillac XT4 Owner Manual (GMNA-Localizing-Europe-15440913) - 2022 -
CRC - 5/13/21
INSTRUMENTS AND CONTROLS
107
Caution (Continued)
the original tyre specifications, can
cause this light to come on. This
could lead to costly repairs not
covered by the vehicle warranty.
This could also affect the vehicle's
ability to pass an Emissions
Inspection/Maintenance test. See
When the light is on, a malfunction
has been detected. Diagnosis and
service may be required.
Poor fuel quality can cause inefficient
engine operation and poor driveability,
which may go away once the engine is
warmed up. If this occurs, change the
fuel brand. It may require at least one
full tank of the proper fuel to turn the
light off. See
.
If the light remains on, see your
retailer.
Emissions Inspection and
Maintenance Programs
If the vehicle requires an Emissions
Inspection/Maintenance test, the test
equipment will likely connect to the
vehicle's Data Link Connector (DLC).
The DLC is under the instrument
panel to the left of the steering wheel.
Connecting devices that are not used
to perform an Emissions Inspection/
Maintenance test or to service the
vehicle may affect vehicle operation.
See
See your dealer if assistance is needed.
The vehicle may not pass
inspection if:
.
The light is on when the engine is
running.
.
The light does not come on when
the ignition is in Service Mode.
.
Critical emission control systems
have not been completely
diagnosed. If this happens, the
vehicle would not be ready for
inspection and might require
several days of routine driving
before the system is ready for
inspection. This can happen if the
12-volt battery has recently been
replaced or run down, or if the
vehicle has recently been serviced.
See your retailer if the vehicle will not
pass or cannot be made ready for
the test.
Brake System Warning
Light
This light should illuminate briefly
when the vehicle is turned on. If it
does not come on then, have it fixed
so it will be ready to warn you if there
is a problem.