2009 JEEP LIBERTY fuel pressure

Airbag Warning Light
The light should come on and remain on for six to eight
seconds as a bulb check when the ignition switch is first
turned ON. If the light is not lit during starting, see your
authorized dealer. If the light stays on, flickers, or comes
on while driving, have the system checked by an autho-
rized dealer.
Defroster
Check operation by selecting the defrost mode and place
the blower control on high speed. You should be able to
feel the air directed against the windshield. See your
authorized dealer for service if your defroster is
inoperable.
Periodic Safety Checks You Should Make Outside
the Vehicle
Tires
Examine tires for excessive tread wear and uneven wear
patterns. Check for stones, nails, glass, or other objectslodged in the tread. Inspect the tread and sidewall for
cuts and cracks. Check the wheel nuts for tightness.
Check the tires (including spare) for proper pressure.
Lights
Have someone observe the operation of exterior lights
while you work the controls. Check turn signal and high
beam indicator lights on the instrument panel.
Door Latches
Check for positive closing, latching, and locking.
Fluid Leaks
Check area under vehicle after overnight parking for fuel,
engine coolant, oil, or other fluid leaks. Also, if gasoline
fumes are detected or if fuel, power steering fluid, or
brake fluid leaks are suspected, the cause should be
located and corrected immediately.
THINGS TO KNOW BEFORE STARTING YOUR VEHICLE 83
2

INSTRUMENT CLUSTER DESCRIPTIONS
1. Fuel Gauge
The fuel gauge shows level of fuel in tank when ignition
switch is in the ON position.
2. Fuel Door ReminderThis symbol indicates the side of the vehicle
where the fuel cap is located.
3. Low Fuel Light This indicator lights when the fuel level drops to
approximately one-eighth tank.
4. Tire Pressure Monitoring Telltale Light Each tire, including the spare (if provided),
should be checked monthly, when cold and
inflated to the inflation pressure recommended
by the vehicle manufacturer on the vehicle
placard or tire inflation pressure label. (If your vehicle has tires of a different size than the size indicated on the
vehicle placard or tire inflation pressure label, you should
determine the proper tire inflation pressure for those
tires.)
As an added safety feature, your vehicle has been
equipped with a Tire Pressure Monitoring System
(TPMS) that illuminates a low tire pressure telltale when
one or more of your tires is significantly under-inflated.
Accordingly, when the low tire pressure telltale illumi-
nates, you should stop and check your tires as soon as
possible, and inflate them to the proper pressure. Driving
on a significantly under-inflated tire causes the tire to
overheat and can lead to tire failure. Under-inflation also
reduces fuel efficiency and tire tread life, and may affect
the vehicle’s handling and stopping ability.
Please note that the TPMS is not a substitute for proper
tire maintenance, and it is the driver ’s responsibility to
202 UNDERSTANDING YOUR INSTRUMENT PANEL

26. 4WD Indicator — Vehicles Equipped with
Selec-TracII
This light alerts the driver that the vehicle is in
the full-time four-wheel drive auto mode. In
this mode, the system operates with a normal
torque split of 42% front axle and 58% rear axle.
It can redirect up to 100% of torque to the front or rear
axle, if necessary.
27. Odometer/Trip Odometer
The odometer shows the total distance the vehicle has
been driven. The trip odometer shows individual trip
mileage. Refer to “Trip Odometer button” for additional
information.
NOTE: U.S. Federal regulations require upon transfer of
vehicle ownership, the seller certify the mileage the
vehicle has been driven. Therefore, if the odometer
reading is changed because of repair or replacement, be sure to keep a record of the reading before and after the
service so that the correct mileage can be determined.
Vehicle Warning Messages
When the appropriate conditions exist, messages such as
“door” (door ajar), “gATE” (liftgate ajar), “gLASS”
(flip-up glass ajar), “gASCAP” (fuel cap fault), “LoW
tirE” (low tire pressure), or “CHANgE OIL” will display
in the odometer.
LoW tirE
When the appropriate condition exists, the odometer
display will toggle between LoW and tirE for three
cycles.
NOTE:
If the instrument cluster is equipped with the
optional Electronic Vehicle Information Center (EVIC),
then most warnings will display in the EVIC.
UNDERSTANDING YOUR INSTRUMENT PANEL 211
4

•Left/Right Rear Door Ajar (one or more, with a single
chime if speed is above 1 mph(1.6 km/h))
•Door(s) Ajar (with a single chime if vehicle is in
motion)
•Liftgate Ajar (with a single chime)
•Left Front Low Pressure (with a single chime). Refer to
“Tire Pressure Monitoring System” in Section 5 of this
manual.
•Left Rear Low Pressure (with a single chime). Refer to
“Tire Pressure Monitoring System” in Section 5 of this
manual.
•Right Front Low Pressure (with a single chime). Refer
to “Tire Pressure Monitoring System” in Section 5 of
this manual.
•Right Rear Low Pressure (with a single chime). Refer
to “Tire Pressure Monitoring System” in Section 5 of
this manual.
•Check TPM System (with a single chime). Refer to
“Tire Pressure Monitoring System” in Section 5 of this
manual.
•Check Gascap (refer to “Adding Fuel” in Section 5 of
this manual for more details)
•Service Park Assist System (with a single chime)
•Oil Change Required (with a single chime)
Oil Change Required
Your vehicle is equipped with an engine oil change
indicator system. The “Oil Change Required” message
will flash in the EVIC display for approximately 10 sec-
onds after a single chime has sounded to indicate the next
scheduled oil change interval. The engine oil change
indicator system is duty cycle based, which means the
engine oil change interval may fluctuate dependent upon
your personal driving style.
218 UNDERSTANDING YOUR INSTRUMENT PANEL

▫Tire Loading And Tire Pressure .......... 342
 Tires — General Information ............. 346
▫ Tire Pressure ....................... 346
▫ Tire Inflation Pressures ................ 347
▫ Tire Pressures For High Speed Operation . . . 349
▫ Radial-Ply Tires ..................... 349
▫ Compact Spare Tire — If Equipped ....... 350
▫ Tire Spinning ....................... 351
▫ Tread Wear Indicators ................. 351
▫ Life Of Tire ........................ 352
▫ Replacement Tires .................... 352
 Tire Chains .......................... 353
 Tire Rotation Recommendations ........... 355
Tire Pressure Monitor System (TPMS) ....... 356
▫ Base System ........................ 358
▫ Premium System — If Equipped ......... 361
▫ General Information .................. 365
 Fuel Requirements ..................... 365
▫ Reformulated Gasoline ................ 366
▫ Gasoline/Oxygenate Blends ............. 366
▫ E-85 Usage In Non-Flex Fuel Vehicles ...... 367
▫ MMT In Gasoline .................... 367
▫ Materials Added To Fuel ............... 368
▫ Fuel System Cautions ................. 368
▫ Carbon Monoxide Warnings ............ 369
STARTING AND OPERATING 289
5

WARNING! (Continued)
•Unequal tire pressures can cause steering prob-
lems. You could lose control of your vehicle.
• Over-inflated or under-inflated tires can affect
vehicle handling and can fail suddenly, resulting in
loss of vehicle control.
• Unequal tire pressures from one side of the vehicle
to the other can cause the vehicle to drift to the right
or left.
• Always drive with each tire inflated to the recom-
mended cold tire inflation pressure.
Economy
Improper inflation pressures can cause uneven wear
patterns to develop across the tire tread. These abnormal
wear patterns will reduce tread life resulting in a need for earlier tire replacement. Under-inflation also increases
tire rolling resistance and results in higher fuel
consumption.
Ride Comfort and Vehicle Stability
Proper tire inflation contributes to a comfortable ride.
Over-inflation produces a jarring and uncomfortable
ride. Both under-inflation and over-inflation affect the
stability of the vehicle and can produce a feeling of
sluggish response or over responsiveness in the steering.
Unequal tire pressures can cause erratic and unpredict-
able steering response.
Unequal tire pressure from side to side may cause the
vehicle to drift left or right.
Tire Inflation Pressures
The proper cold tire inflation pressure is listed on the
driver’s side “B” Pillar.
STARTING AND OPERATING 347
5

NOTE:
•The TPMS is not intended to replace normal tire care
and maintenance, or to provide warning of a tire
failure or condition.
•The TPMS should not be used as a tire pressure gauge
while adjusting your tire pressure.
•Driving on a significantly under-inflated tire causes
the tire to overheat and can lead to tire failure.
Under-inflation also reduces fuel efficiency and tire
tread life, and may affect the vehicle’s handling and
stopping ability.
•The TPMS is not a substitute for proper tire mainte-
nance, and it is the driver ’s responsibility to maintain
correct tire pressure using an accurate tire pressure
gauge, even if under-inflation has not reached the
level to trigger illumination of the Tire Pressure Moni-
toring Telltale Light.
•Seasonal temperature changes will affect tire pressure,
and the TPMS will monitor the actual tire pressure in
the tire.
Base System
The Tire Pressure Monitor System (TPMS) uses wireless
technology with wheel rim mounted electronic sensors to
monitor tire pressure levels. Sensors, mounted to each
wheel as part of the valve stem, transmit tire pressure
readings to the receiver module.
NOTE:It is particularly important for you to check the
tire pressure in all of the tires on your vehicle monthly
and to maintain the proper pressure.
The TPMS consists of the following components:
•Receiver Module
•Four Tire Pressure Monitoring Sensors
•Tire Pressure Monitoring Telltale Light
358 STARTING AND OPERATING

5. Once you repair or replace the original road tire and
reinstall it on the vehicle in place of the compact spare,
the TPMS will update automatically. In addition, the
TPMS Telltale Light will turn off and the graphic in the
EVIC will display a new pressure value instead of dashes
(- -), as long as no tire pressure is below the low-pressure
warning limit in any of the four active road tires. The
vehicle may need to be driven for up to 20 minutes above
15 mph (25 km/h) in order for the TPMS to receive this
information.
General Information
This device complies with Part 15 of the FCC rules and
RSS 210 of Industry Canada. Operation is subject to the
following conditions:
•This device may not cause harmful interference.
•This device must accept any interference received,
including interference that may cause undesired
operation.The tire pressure sensors are covered under one of the
following licenses:
United States
..................... KR5S120123
Canada ........................ 2671-S120123
FUEL REQUIREMENTS
Your engine is designed to meet all emis-
sions regulations and provide excellent
fuel economy and performance when us-
ing high quality unleaded “regular” gaso-
line having an octane rating of 87. The use
of premium gasoline is not recommended,
as it will not provide any benefit over regular gasoline in
these engines.
Light spark knock at low engine speeds is not harmful to
your engine. However, continued heavy spark knock at
high speeds can cause damage and immediate service is
required. Poor quality gasoline can cause problems such
STARTING AND OPERATING 365
5