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• If you just drove through a deep
puddle of water, your vehicle’s
electrical system might be
wet. The condition is usually
corrected when the electrical
system dries out. A few driving
trips should turn the light off.
• If you recently changed brands of
fuel, be sure to fuel your vehicle
with quality fuel. See Gasoline
Octane on page 8-33. Poor
fuel quality causes the engine
not to run as efficiently as
designed. You might notice this
as stalling after start-up,
stalling when you put the vehicle
into gear, misfiring, hesitation
on acceleration, or stumbling on
acceleration — these conditions
might go away once the
engine is warmed up.
If you experience one or more of
these conditions, change the
fuel brand you use. It will require
at least one full tank of the
proper fuel to turn the light off.
If none of the above have made
the light turn off, your dealer/retailer
can check the vehicle. Your
dealer/retailer has the proper test
equipment and diagnostic tools to
fix any mechanical or electrical
problems that might have
developed.
Emissions Inspection and
Maintenance Programs
Some state/provincial and local
governments have or might begin
programs to inspect the emission
control equipment on your vehicle.
Failure to pass this inspection
could prevent getting a vehicle
registration.
Here are some things to know to
help your vehicle pass an
inspection:
• Your vehicle will not pass this
inspection if the check engine
light is on or not working properly.
• Your vehicle will not pass
this inspection if the OBD
(on-board diagnostic) system
determines that critical emission
control systems have not
been completely diagnosed by
the system. The vehicle would be
considered not ready for
inspection. This can happen if
you have recently replaced
the battery or if the battery has
run down. The diagnostic system
is designed to evaluate critical
emission control systems
during normal driving. This can
take several days of routine
driving. If you have done this and
your vehicle still does not pass
the inspection for lack of
OBD system readiness, your
dealer/retailer can prepare
the vehicle for inspection.
4-20 Instruments and Controls
2008 - Pontiac G8 Owner Manual