2001 Mercury Grand Marquis check engine light

SERVICE RECOMMENDATIONS
To help you service your vehicle:
²We highlight do-it-yourself items in the engine compartment for easy
location.
²We provide a scheduled maintenance guide which makes tracking
routine service easy.
If your vehicle requires professional service, your dealership can provide
the necessary parts and service. Check yourWarranty Guideto find out
which parts and services are covered.
Use only recommended fuels, lubricants, fluids and service parts
conforming to specifications. Motorcraft parts are designed and built to
provide the best performance in your vehicle.
PRECAUTIONS WHEN SERVICING YOUR VEHICLE
Be especially careful when inspecting or servicing your vehicle.
²Do not work on a hot engine.
²When the engine is running, keep loose clothing, jewelry or long hair
away from moving parts.
²Do not work on a vehicle with the engine running in an enclosed
space, unless you are sure you have enough ventilation.
²Keep all lit cigarettes, open flames and other lit material away from
the battery and all fuel related parts.
If you disconnect the battery, the engine must ªrelearnº its idle
conditions before your vehicle will drive properly, as explained in the
Batterysection in this chapter.
Maintenance and care
168

WINDSHIELD WASHER FLUID
Washer fluid
Check the washer fluid whenever
you stop for fuel. The reservoir is
highlighted with a
symbol.
If the level is low, add enough fluid
to fill the reservoir. In very cold
weather, do not fill the reservoir all
the way.
Only use a washer fluid that meets Ford specification . Refer to
Lubricant specificationsin theCapacities and specificationschapter.
State or local regulations on volatile organic compounds may restrict the
use of methanol, a common windshield washer antifreeze additive.
Washer fluids containing non-methanol antifreeze agents should be used
only if they provide cold weather protection without damaging the
vehicle's paint finish, wiper blades or washer system.
Do not put washer fluid in the engine coolant reservoir. Washer
fluid placed in the cooling system may harm engine and cooling
system components.
ENGINE COOLANT
Checking engine coolant
The concentration and level of engine coolant should be checked at the
mileage intervals listed in the scheduled maintenance guide. The coolant
concentration should be maintained at 50/50 coolant and water, which
equates to a freeze point of -36É C (-34É F). Coolant concentration
testing is possible with a hydrometer or antifreeze tester (such as the
Rotunda Battery and Antifreeze Tester, 014±R1060). The level of coolant
should be maintained at the ªcold fullº of ªcold fill rangeº level in the
coolant reservoir. If the level falls below, add coolant per the instructions
in theAdding Engine Coolantsection.
Maintenance and care
175

How fail-safe cooling works
²Standard cluster
²Optional cluster
If the engine begins to overheat:
²The engine coolant temperature gauge will move to the H (hot) area
(if your vehicle is equipped with analog gauges).
²The engine coolant temperature gauge will illuminate all eight bars
and a tone will sound every five seconds for one minute (if your
vehicle is equipped with digital gauges).
²The
symbol will illuminate.
²TheCheck Engineindicator light will illuminate.
If the engine reaches a preset over-temperature condition, the engine
will automatically switch to alternating cylinder operation. Each disabled
cylinder acts as an air pump and cools the engine.
When this occurs the vehicle will still operate. However:
²The engine power will be limited.
²The air conditioning system will be disabled.
TEMPH
C
N
O
R
M
H
C
Maintenance and care
181

The flow of fuel through a fuel pump nozzle can produce static
electricity, which can cause a fire if fuel is pumped into an
ungrounded fuel container.
Use the following guidelines to avoid static build-up when filling an
ungrounded fuel container:
²Place approved fuel container on the ground.
²DO NOT fill a fuel container while it is in the vehicle (including the
cargo area).
²Keep the fuel pump nozzle in contact with the fuel container while
filling.
²DO NOT use a device that would hold the fuel pump handle in the fill
position.
Fuel Filler Cap
Your fuel tank filler cap has an indexed design with a 1/8 turn on/off
feature.
When fueling your vehicle:
1. Turn the engine off.
2. Carefully turn the filler cap counterclockwise 1/8 of a turn until it
stops.
3. Pull to remove the cap from the fuel filler pipe.
4. To install the cap, align the tabs on the cap with the notches on the
filler pipe.
5. Turn the filler cap clockwise 1/8 of a turn until it stops.
ªCheck Fuel Capº illuminates when the ignition is turned to the ON
position to ensure your bulb is working. When this light turns on, check
the fuel filler cap. Continuing to operate the vehicle with the Check Fuel
Cap light on, can activate the Service Engine Soon warning. When the
fuel filler cap is properly re-installed, the light(s) will turn off after a
period of normal driving.It may take a long period of time for the
system to detect an improperly installed fuel filler cap.
If you must replace the fuel filler cap, replace it with a fuel filler
cap that is designed for your vehicle. The customer warranty may
be void for any damage to the fuel tank or fuel system if the
correct genuine Ford or Motorcraft fuel filler cap is not used.
Maintenance and care
197

²Anticipate stopping; slowing down may eliminate the need to stop.
²Sudden or hard accelerations may reduce fuel economy.
²Slow down gradually.
²Driving at reasonable speeds (traveling at 88 km/h [55 mph] uses 15%
less fuel than traveling at 105 km/h [65 mph]).
²Revving the engine before turning it off may reduce fuel economy.
²Using the air conditioner or defroster may reduce fuel economy.
²You may want to turn off the speed control in hilly terrain if
unnecessary shifting between third and fourth gear occurs.
Unnecessary shifting of this type could result in reduced fuel
economy.
²Warming up a vehicle on cold mornings is not required and may
reduce fuel economy.
²Resting your foot on the brake pedal while driving may reduce fuel
economy.
²Combine errands and minimize stop-and-go driving.
Maintenance
²Keep tires properly inflated and use only recommended size.
²Operating a vehicle with the wheels out of alignment will reduce fuel
economy.
²Perform all regularly scheduled maintenance items. Follow the
recommended maintenance schedule and owner maintenance checks
found in your vehicle scheduled maintenance guide.
Conditions
²Heavily loading a vehicle or towing a trailer may reduce fuel economy
at any speed.
²Carrying unnecessary weight may reduce fuel economy (approximately
0.4 km/L [1 mpg] is lost for every 180 kg [400 lb] of weight carried).
²Adding certain accessories to your vehicle (for example bug
deflectors, rollbars/light bars, running boards, ski/luggage racks) may
reduce fuel economy.
²Using fuel blended with alcohol may lower fuel economy.
²Fuel economy may decrease with lower temperatures during the first
12±16 km (8±10 miles) of driving.
Maintenance and care
202

Illumination of the ªCheck Engineº light, charging system warning light
or the temperature warning light, fluid leaks, strange odors, smoke or
loss of engine power, could indicate that the emission control system is
not working properly.
Exhaust leaks may result in entry of harmful and potentially
lethal fumes into the passenger compartment.
Do not make any unauthorized changes to your vehicle or engine. By
law, vehicle owners and anyone who manufactures, repairs, services,
sells, leases, trades vehicles, or supervises a fleet of vehicles are not
permitted to intentionally remove an emission control device or prevent
it from working. Information about your vehicle's emission system is on
the Vehicle Emission Control Information Decal located on or near the
engine. This decal identifies engine displacement and gives some tune up
specifications.
Please consult yourWarranty Guidefor complete emission warranty
information.
Readiness for Inspection/Maintenance (I/M) testing
In some localities, it may be a legal requirement to pass an I/M test of
the on-board diagnostics system. If your ªCheck Engine/Service Engine
Soonº light is on, refer to the description in theWarning lights and
chimessection of theInstrumentationchapter. Your vehicle may not
pass the I/M test with the ªCheck Engine/Service Engine Soonº light on.
If the vehicle's powertrain system or its battery has just been serviced,
the on-board diagnostics system is reset to a ªnot ready for I/M testº
condition. To ready the on-board diagnostics system for I/M testing, a
minimum of 30 minutes of city and highway driving is necessary as
described below:
²First, at least 10 minutes of driving on an expressway or highway.
²Next, at least 20 minutes driving in stop-and-go, city-type traffic with
at least four idle periods.
Allow the vehicle to sit for at least eight hours without starting the
engine. Then, start the engine and complete the above driving cycle. The
engine must warm up to its normal operating temperature. Once started,
do not turn off the engine until the above driving cycle is complete.
Maintenance and care
204

A
Air bag supplemental restraint
system ........................................116
and child safety seats ............118
description ..............................116
disposal ....................................120
driver air bag ..........................118
indicator light ...................10, 120
operation .................................118
passenger air bag ...................118
Air cleaner filter ...............188, 216
Air conditioning ..........................29
automatic temperature
control system ..........................32
Air suspension ...........................138
description ..............................138
warning light .............................13
Antifreeze (see Engine
coolant) .....................................175
Anti-lock brake system
(see Brakes) ......................134±135
Audio system (see Radio) .........38
Automatic transmission
driving an automatic
overdrive .................................140
fluid, adding ............................183
fluid, checking ........................183
fluid, refill capacities ..............216
fluid, specification ..................219
Auxiliary power point ...........65, 83
Axle
lubricant specifications ..218±219
refill capacities ........................216
traction lok ..............................143B
Battery .......................................186
acid, treating emergencies .....186
charging system warning light..13
jumping a disabled battery ....162
maintenance-free ....................186
replacement, specifications ...216
servicing ..................................186
voltage gauge ............................21
Belt minder ...............................112
Brakes ........................................134
anti-lock ...........................134±135
anti-lock brake system
(ABS) warning light .........12, 135
brake warning light ..................12
fluid, checking and adding ....174
fluid, refill capacities ..............216
fluid, specifications .........218±219
lubricant specifications ..218±219
pedals (see Power adjustable
foot pedals) ...............................64
shift interlock ..........................139
Break-in period .............................3
C
Capacities for refilling fluids ....216
Cassette tape player ...................50
CD changer .................................60
Certification Label ....................221
Child safety restraints ..............121
child safety belts ....................121
Child safety seats ......................122
attaching with tether straps ..127
in front seat ............................124
in rear seat ......................124, 126
Cleaning your vehicle ...............210
Index
234

engine compartment ..............213
exterior ............................211±212
exterior lamps .........................212
instrument cluster lens ..........215
instrument panel ....................214
interior .....................................215
mirrors .....................................212
plastic parts ............................212
safety belts ..............................215
washing ....................................211
waxing .....................................211
wheels ......................................212
windows ..................................215
wiper blades ............................213
woodtone trim ........................215
Climate control (see Air
conditioning or Heating) ............29
Clock ............................................64
Compass, electronic ....................78
calibration .................................79
set zone adjustment .................79
Console ........................................83
Controls
power seat .......................100±101
steering column ........................73
Coolant
checking and adding ..............175
coolant temperature light ........11
refill capacities ................179, 216
specifications ..................218±219
Cruise control (see Speed
control) ........................................69
Customer Assistance ................149
Ford accessories for your
vehicle .....................................229
Ford Extended
Service Plan ............................222
Getting assistance outside the
U.S. and Canada .....................228Getting roadside assistance ...149
Getting the service
you need .................................222
Ordering additional owner's
literature .................................231
The Dispute Settlement
Board .......................................224
Utilizing the
Mediation/Arbitration
Program ...................................227
D
Daytime running lamps
(see Lamps) ................................27
Defrost
rear window ..............................38
Dipstick
automatic transmission
fluid ..........................................183
engine oil .................................171
Doors
lubricant specifications ..........218
Driving under special conditions
through water .........................148
E
Electronic message center .........22
Emergencies, roadside
jump-starting ..........................162
Emission control system ..........203
Engine ................................219±220
check engine/service engine
soon light ....................................9
cleaning ...................................213
coolant .....................................175
fail-safe coolant ......................180
idle speed control ...................186
Index
235