Charging System Light; Malfunction Indicator Lamp; (Check Engine Light) - Cadillac XT5 2017 Owner's Manual

CHARGING SYSTEM LIGHT

The charging system light comes on
briefly when the ignition is turned on,
but the engine is not running, as a
check to show the light is working.
It should go out when the engine is
started.
If the light stays on, or comes on while
driving, there may be a problem with
the electrical charging system. Have it
checked by your dealer. Driving while
this light is on could drain the battery.
When this light comes on, or is
flashing, the Driver Information Center
(DIC) also displays a message.
See Battery Voltage and Charging
Messages 0 141.
If a short distance must be driven with
the light on, be sure to turn off all
accessories, such as the radio and air
conditioner.
MALFUNCTION INDICATOR
LAMP (CHECK ENGINE
LIGHT)
This light is part of the vehicle s
emission control on-board diagnostic
system. If this light is on while the
engine is running, a malfunction has
been detected and the vehicle may
require service. The light should come
on to show that it is working when the
ignition is in Service Only Mode. See
Ignition Positions 0 190.
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.
INSTRUMENTS AND CONTROLS
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 vehicle warranty.
This could also affect the vehicle s
ability to pass an Emissions
Inspection/Maintenance test. See
Accessories and Modifications 0 248.
127