2007 SATURN SKY check engine

Highway Hypnosis
Is there actually such a condition as highway
hypnosis? Or is it just plain falling asleep at the
wheel? Call it highway hypnosis, lack of
awareness, or whatever.
There is something about an easy stretch of road
with the same scenery, along with the hum of the
tires on the road, the drone of the engine, and the
rush of the wind against the vehicle that can make
you sleepy. Do not let it happen to you! If it does,
your vehicle can leave the road in less than a
second, and you could crash and be injured.
What can you do about highway hypnosis?
First, be aware that it can happen.
Then here are some tips:
Make sure your vehicle is well ventilated, with
a comfortably cool interior.
Keep your eyes moving. Scan the road ahead
and to the sides. Check your rearview mirrors
and your instruments frequently.
If you get sleepy, pull off the road into a rest,
service, or parking area and take a nap, get
some exercise, or both. For safety, treat
drowsiness on the highway as an emergency.
Hill and Mountain Roads
Driving on steep hills or mountains is different
from driving in at or rolling terrain.
216
ProCarManuals.com

If you drive regularly in steep country, or if you are
planning to visit there, here are some tips that
can make your trips safer and more enjoyable.
Keep your vehicle in good shape. Check all
uid levels and also the brakes, tires, cooling
system, and transmission. These parts can
work hard on mountain roads.
{CAUTION:
If you do not shift down, your brakes
could get so hot that they would not work
well. You would then have poor braking or
even none going down a hill. You could
crash. Shift down to let your engine assist
your brakes on a steep downhill slope.
{CAUTION:
Coasting downhill in NEUTRAL (N) or with
the ignition off is dangerous. Your brakes
will have to do all the work of slowing
down. They could get so hot that they
would not work well. You would then have
poor braking or even none going down a
hill. You could crash. Always have your
engine running and your vehicle in gear
when you go downhill.
Know how to go down hills. The most important
thing to know is this: let your engine do some of
the slowing down. Shift to a lower gear when
you go down a steep or long hill.
Know how to go uphill. You may want to shift
down to a lower gear. The lower gears help
cool your engine and transmission, and you
can climb the hill better.
217
ProCarManuals.com

{CAUTION:
Snow can trap exhaust gases under your
vehicle. This can cause deadly CO (carbon
monoxide) gas to get inside. CO could
overcome you and kill you. You cannot see
it or smell it, so you might not know it is in
your vehicle. Clear away snow from around
the base of your vehicle, especially any
that is blocking your exhaust pipe. And
check around again from time to time to be
sure snow does not collect there.
Open a window just a little on the side of
the vehicle that is away from the wind.
This will help keep CO out.Run your engine only as long as you must. This
saves fuel. When you run the engine, make it go
a little faster than just idle. That is, push the
accelerator slightly. This uses less fuel for the heat
that you get and it keeps the battery charged.
You will need a well-charged battery to restart the
vehicle, and possibly for signaling later on with
your headlamps. Let the heater run for a while.
Then, shut the engine off and close the window
almost all the way to preserve the heat. Start
the engine again and repeat this only when you
feel really uncomfortable from the cold. But do it as
little as possible. Preserve the fuel as long as
you can. To help keep warm, you can get out of
the vehicle and do some fairly vigorous exercises
every half hour or so until help comes.
223
ProCarManuals.com

Service........................................................ 233
Accessories and Modications................... 233
California Proposition 65 Warning.............. 234
Doing Your Own Service Work.................. 234
Adding Equipment to the Outside
of Your Vehicle...................................... 235
Fuel............................................................. 235
Gasoline Octane........................................ 235
Gasoline Specications.............................. 236
California Fuel........................................... 236
Additives................................................... 236
Fuels in Foreign Countries........................ 237
Filling the Tank......................................... 238
Filling a Portable Fuel Container............... 240
Checking Things Under the Hood.............. 240
Hood Release........................................... 241
Engine Compartment Overview.................. 242
Engine Oil................................................. 245
Engine Oil Life System.............................. 250
Engine Air Cleaner/Filter............................ 252
Automatic Transmission Fluid.................... 254
Manual Transmission Fluid........................ 254
Hydraulic Clutch........................................ 254Engine Coolant.......................................... 255
Coolant Surge Tank Pressure Cap............ 258
Engine Overheating................................... 258
Cooling System......................................... 260
Power Steering Fluid ................................. 266
Windshield Washer Fluid........................... 267
Brakes...................................................... 268
Battery...................................................... 271
Jump Starting............................................ 272
Rear Axle.................................................... 278
Headlamp Aiming........................................ 278
Bulb Replacement....................................... 279
Halogen Bulbs........................................... 279
Headlamps and Parking Lamps................. 279
Front Turn Signal, Parking and
Fog Lamps............................................ 280
Taillamps, Turn Signal, Stoplamps
and Sidemarker Lamps.......................... 281
Back-Up Lamps......................................... 282
License Plate Lamp................................... 282
Replacement Bulbs................................... 283
Windshield Wiper Blade Replacement....... 283
Section 5 Service and Appearance Care
231
ProCarManuals.com

Adding Equipment to the Outside
of Your Vehicle
Things you might add to the outside of your
vehicle can affect the airow around it. This may
cause wind noise and affect windshield washer
performance. Check with your retailer before
adding equipment to the outside of your vehicle.
Fuel
Use of the recommended fuel is an important
part of the proper maintenance of your vehicle.
To help keep your engine clean and maintain
optimum vehicle performance, Saturn recommends
the use of gasoline advertised as TOP TIER
Detergent Gasoline.
Gasoline Octane
Use premium unleaded gasoline with a posted
octane rating of 91 or higher. You may also
use regular unleaded gasoline rated at 87 octane
or higher, but your vehicle’s acceleration may
be slightly reduced, and you may notice a slight
audible knocking noise, commonly referred to
as spark knock. If the octane is less than 87,
you may notice a heavy knocking noise when
you drive. If this occurs, use a gasoline rated
at 87 octane or higher as soon as possible.
Otherwise, you might damage your engine.
If you are using gasoline rated at 87 octane
or higher and you hear heavy knocking, your
engine needs service.
235
ProCarManuals.com

Gasoline Specications
At a minimum, gasoline should meet ASTM
specication D 4814 in the United States or
CAN/CGSB-3.5 in Canada. Some gasolines may
contain an octane-enhancing additive called
methylcyclopentadienyl manganese tricarbonyl
(MMT). Saturn recommends against the use
of gasolines containing MMT. SeeAdditives
on page 236for additional information.
California Fuel
If your vehicle is certied to meet California
Emissions Standards, it is designed to operate
on fuels that meet California specications.
See the underhood emission control label.
If this fuel is not available in states adopting
California emissions standards, your vehicle
will operate satisfactorily on fuels meeting
federal specications, but emission control
system performance may be affected. The
malfunction indicator lamp may turn on
and your vehicle may fail a smog-check test.SeeMalfunction Indicator Lamp on page 138.
If this occurs, return to your authorized Saturn
retailer for diagnosis. If it is determined that
the condition is caused by the type of fuel used,
repairs may not be covered by your warranty.
Additives
To provide cleaner air, all gasolines in the
United States are now required to contain additives
that will help prevent engine and fuel system
deposits from forming, allowing your emission
control system to work properly. In most cases,
you should not have to add anything to your
fuel. However, some gasolines contain only the
minimum amount of additive required to meet
U.S. Environmental Protection Agency regulations.
To help keep fuel injectors and intake valves
clean, or if your vehicle experiences problems due
to dirty injectors or valves, look for gasoline that
is advertised as TOP TIER Detergent Gasoline.
Also, your retailer has additives that will help
correct and prevent most deposit-related problems.
236
ProCarManuals.com

Filling a Portable Fuel Container
{CAUTION:
Never ll a portable fuel container while it is
in your vehicle. Static electricity discharge
from the container can ignite the gasoline
vapor. You can be badly burned and your
vehicle damaged if this occurs. To help
avoid injury to you and others:
Dispense gasoline only into approved
containers.
Do not ll a container while it is inside
a vehicle, in a vehicle’s trunk, pickup
bed, or on any surface other than the
ground.
Bring the ll nozzle in contact with
the inside of the ll opening before
operating the nozzle. Contact should
be maintained until the lling is
complete.
Do not smoke while pumping gasoline.
Checking Things Under
the Hood
{CAUTION:
An electric fan under the hood can start up
and injure you even when the engine is not
running. Keep hands, clothing, and tools
away from any underhood electric fan.
{CAUTION:
Things that burn can get on hot engine
parts and start a re. These include
liquids like fuel, oil, coolant, brake uid,
windshield washer and other uids, and
plastic or rubber. You or others could be
burned. Be careful not to drop or spill
things that will burn onto a hot engine.
240
ProCarManuals.com

A. Windshield Washer Fluid Reservoir. See
“Adding Washer Fluid” underWindshield
Washer Fluid on page 267.
B. Coolant Surge Tank and Pressure Cap.
SeeCooling System on page 260.
C. Brake Master Cylinder Reservoir. See
“Brake Fluid” underBrakes on page 268
andHydraulic Clutch on page 254.
D. Engine Oil Dipstick (Out of View). See
“Checking Engine Oil” underEngine Oil
on page 245.
E. Engine Air Cleaner/Filter. SeeEngine
Air Cleaner/Filter on page 252.F. Engine Oil Fill Cap. See “When to Add
Engine Oil” underEngine Oil on page 245.
G. Power Steering Fluid Reservoir. See
Power Steering Fluid on page 266.
H. Remote Negative (−) Ground (Out of View).
SeeJump Starting on page 272.
I. Battery (Out of View). SeeBattery on page 271.
J. Remote Positive (+) Terminal. SeeJump
Starting on page 272.
K. Underhood Fuse Block. SeeUnderhood
Fuse Block on page 328.
243
ProCarManuals.com