2

........Instrument Panel Indicators . 3...........................................Gauges . 5

........................................Rear Seat . 5

.................................................Fuel . 6....................Refueling Procedure . 7

..........Fuel System Components . 11.....................Fuel Cutoff System . 12

...........................Carrying Cargo . 13

....................Starting the Engine . 15.........................Towing a Trailer . 16

..................Maintenance Minder . 17....................................Engine Oil . 21

............................Engine Coolant . 21.....................................Fuel Tank . 22

.............................................Tires . 23...........................................Lights . 24

..................Storing Your Vehicle . 25

..................Changing a Flat Tire . 26..If the Fuel System Has a Leak . 28

..............................Jump Starting . 29............................................Fuses . 30

............................Fuse Locations . 30

..............................Specifications . 31

33

Contents

...........................Introduction .

Instruments and Controls

Before Driving

Driving

Maintenance

Taking Care of the Unexpected

Technical Information

..............Authorized Manuals .

1

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2008 Civic Sedan GX Online Reference Owner's Manual Refer to 2008 Civic Sedan Owner's Manual for topics not covered. Owner's Identification Form

00X31-SNF-9200

Your Civic GX runs on compressednatural gas (CNG), a highlypressurized version of the sameclean-burning natural gas used inmany homes.

Your Civic GX operates andperforms like a gasoline-poweredCivic. However, there are a fewdifferences you should be aware of.In addition to reading the CivicSedan owner’s manual, please readthis supplement carefully tounderstand the operation and uniquefeatures of your Civic GX.

You will find important safetyinformation in this supplement andin the owner’s manual. Thisinformation alerts you to potentialhazards that could hurt you or others.Please read it carefully.

Introduction

2

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2008 Civic Sedan GX

CONTINUED

This indicator comes on for a fewseconds when you turn the ignitionswitch to the ON (II) position. If itcomes on at any other time, itindicates one of the engine’semissions control systems may havea problem. For complete information,refer to the Civic Sedan owner’smanual.

This indicator will also come on ifthere is a problem in the fuel system.If this happens, have the vehiclechecked by an authorized HondaCivic GX dealer as soon as possible.Drive moderately until the dealer hasinspected the problem. Avoid full-throttle acceleration and driving athigh speed.

Instruments and Controls

Malfunction IndicatorLamp

Instrument Panel Indicators

3

MALFUNCTION INDICATOR LAMP

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2008 Civic Sedan GX

－－

－

If you smell natural gas or hear ahissing sound, except when refueling,the fuel system may have a leak.Follow the instructions under

on pageof this supplement.

This indicator comes on for a fewseconds when you turn the ignitionswitch to the ON (II) position. It alsocomes on as a reminder that youmust refuel soon. The approximatedriving distance remaining when thisindicator comes on is:

City driving 20-25 milesHighway driving 25-30 miles

As the temperature of the outside aircools, the temperature inside the

tank begins to drop, and thepressure inside the tank drops too.This means that when the outside airgets very cold [below 25°F ( 4°C)],the pressure of the natural gas insidethe tank goes down, and the fuelgauge may indicate that you haveless fuel than what actually remainsin the tank. Keep this in mind if thelow fuel indicator comes on whileyou are driving in cold weather.

If this indicator starts blinking andthe fuel level reading goes down toempty when the engine is running, itindicates a problem in the fuelsystem. Have the vehicle checked byan authorized Honda Civic GX dealeras soon as possible.

28

Low Fuel Indicator

If theFuel System Has a Leak

Instruments and Controls

Instrument Panel Indicators

4

LOW FUEL INDICATOR

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2008 Civic Sedan GX

Unlike the standard Civic, the seat-back cannot be folded down.

This gauge shows how much fuelyou have. The quantity of fuelremaining in the tank is calculatedbased on the pressure andtemperature of the natural gas in thefuel tank.

The lower ‘‘F’’ mark indicates a fulltank at a fill pressure of 3,000 psi.

The upper ‘‘F’’ mark indicates a fulltank at a fill pressure of 3,600 psi.

The gauge may show slightly moreor less than the actual amount. Thetank temperature, fill method, andambient conditions may affect thepressure and temperature of thenatural gas.

Fuel Gauge Rear Seat

Instruments and Controls

Gauges, Rear Seat

5

FUEL GAUGE

LOWER ‘‘F’’ MARK

UPPER ‘‘F’’ MARK

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2008 Civic Sedan GX

Your Civic GX is designed to operateon compressed natural gas (CNG).The natural gas you use to refuelmust meet NFPA-52 and SAE J1616standards for fuel composition andquality.

If you use a fuel that does not meetthese standards, you may feel adecrease in engine power and yourvehicle’s emissions controls may bedamaged.

The main component of compressednatural gas is methane, a highlyflammable, colorless gas. While it isthe same gas that is burned ineveryday home appliances such askitchen stoves and water heaters,the CNG in your vehicle is storedunder high pressure (maximum3,600 psi/24,800 kPa).

The CNG system in your vehicle,including the tank and hoses, hasbeen designed to hold gas at thispressure. It has also been tested forsafety. You should never smell gasor hear a hissing sound unless youare refueling. If you smell gas orhear a hissing sound at any othertime, you need to shut down theCNG system. Follow the instructionson page .12

Before Driving

Fuel

Compressed Natural Gas (CNG)

6

Compressed natural gas isflammable and highly explosive.You could be killed or seriouslyinjured if leaking natural gas isignited.

If you suspect a leak, have yourvehicle immediately inspectedand repaired by an authorizedHonda Civic GX dealer.

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2008 Civic Sedan GX

CONTINUED

Your vehicle has an identifying‘‘CNG’’ label attached next to therear license plate. Do not removethis label. This label is necessary forinsuring your vehicle. Drivingwithout this label may violate thelaws or regulations in some states.

There are two methods of refueling,fast filling or slow filling.

Fast filling is normally used in fuelstations for natural gas vehicles. Ittakes about 3 to 5 minutes to fill upthe fuel tank.

Slow filling is done with a vehiclerefueling appliance. Refueling takesabout 1 hour per gasoline gallonequivalent.

Always observe all safetyrecommendations and operatinginstructions on the refuelingequipment.

When refueling, you should use afuel fill nozzle that complies withANSI/AGA NGV-1-1994 standards.Nozzles are designed according totheir maximum fill pressure: P24 for2,400 psi (pounds per square inch),P30 for 3,000 psi, and P36 for 3,600psi.

Your vehicle’s maximum fill pressureis 3,600 psi (24,800 kPa), so youshould refuel with a P36 nozzle.Using a P30 nozzle will fill the tankto the second (3,000 psi) fill mark onthe fuel gauge. Using a P24 nozzlewill not fill the tank completely.

During a fast fill, the natural gas iswarmed by the refueling process.This causes the pressure in the tankto rise and reduces the amount offuel you can put in.

The label shown below is attached tothe fuel receptacle lid.

Before Driving

CNG Identification Refueling Procedure

Fuel, Refueling Procedure

7

CNG LABEL

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2008 Civic Sedan GX

－

－

Turn the ignition switch to theLOCK (0) position, and apply theparking brake.

The refueling equipment andprocedure can vary with therefueling station. The CNG fillnozzle may not look or work like theexample on the next page. Thefollowing steps explain the typicalrefueling procedure with fast fillequipment. With slow fill equipment,or other types of refuelingequipment, follow the instructions onthe equipment.

Park with the driver’s side of thevehicle closest to the refuelingstation.

Open the fuel receptacle lid bypushing the handle on the left ofthe driver’s seat.

Remove the receptacle dust capfrom the fuel receptacle. Clean offany dirt or debris around the fuelreceptacle.

1.

2.

3.

4.

Before Driving

Refueling Procedure

Filling the Fuel Tank

8

RECEPTACLE DUST CAP

PushFUELRECEPTACLEUsing f ast f ill equipment at

temperatures below 4°F ( 16°C) maydamage the f uel system, potentiallycausing a leak. Only use slow f illequipment when ambient temperaturesare below 4°F ( 16°C).

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2008 Civic Sedan GX

CONTINUED

Securely connect the CNG fillnozzle to the fuel receptacle.

Turn the lever until the arrows onthe nozzle point to each other,then follow the instructions on therefueling station to begin refueling.

While refueling, you may hear achattering sound. This is normal.

If you hear or see fuel/vaporleaking from the nozzle-receptacleconnection, stop refuelingimmediately. Dirt or other debrismay be preventing a positiveconnection. Turn off the refuelingstation, remove the nozzle,reconnect it to the receptacle, andbegin refueling again. If itcontinues to leak, have anauthorized Honda Civic GX dealerinspect the sealing O-ring in thereceptacle. It may be missing,damaged, or worn.

Refueling will stop automaticallywhen the tank is full. Follow theinstructions on the refuelingstation to turn it off.

Disconnect the CNG fill nozzlefrom the fuel receptacle by slowlyturning the lever on the nozzle 180degrees. You may hear a briefhissing sound as a small amount ofgas escapes. This is normal.

5. 6.

7.

8.

Before Driving

Refueling Procedure

9

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2008 Civic Sedan GX

If dirt or other debris are adhering tothe inside of the fuel receptacle, gasmay leak out after refueling. If thishappens, clean off the dirt or debriswith a clean, dry rag from the CNGfill nozzle. If you need to add morefuel, do the refueling procedureagain.

Put the receptacle dust cap on thefuel receptacle securely.

Push the fuel receptacle lid closeduntil it latches.

If you do not close the lid, the fuelgauge on the instrument panel willflash when you turn the ignitionswitch to the ON (II) position. Thegauge will stop flashing when youclose the lid.

If you are not sure how to operatethe refueling station, ask forassistance.

To obtain information about thelocations of compressed natural gas(CNG) refueling stations, contact theNatural Gas Vehicle Coalition(NGVC) at (202) 824-7360. Online,use http://afdcmap2.nrel.gov/locator for the 49 states, or www.cngvc.org for California.

9.

10.

Before Driving

Refueling Procedure

Refueling Station Information

10

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2008 Civic Sedan GX

CONTINUED

Fuel system components include afuel tank located in the trunk, anintegrated fuel pressure regulator,an in-tank fuel shutoff valve, highpressure fuel lines, electronicallycontrolled multipoint fuel injectors,and other equipment.

Fuel system components in the CivicGX comply with NFPA-52 standards.

Your vehicle is equipped withgenuine Honda component parts thathave been designed and approvedfor use in a compressed natural gasvehicle. Never modify or replace anyoriginal components or parts withthose specified for a gasoline-powered vehicle.

Improper parts or components candamage your vehicle’s fuel systemand affect your vehicle’s safety andperformance.

Before Driving

Fuel System Components

11

FUEL RECEPTACLEFUEL FEED LINE

FUEL TANKFUEL PRESSURE REGULATOR

FUEL INJECTORS

FUEL FILTER(HIGH PRESSURE)

MANUAL SHUTOFF VALVE

FUEL FILTER(LOW PRESSURE)

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2008 Civic Sedan GX

Fuel system maintenance and repairshould be done only by an authorizedHonda Civic GX dealer.

The in-tank fuel shutoff valve iscontrolled by the ignition switch.When the ignition switch is in theLOCK (0) or ACCESSORY (I)position, the valve is closed, shuttingoff fuel flow to the engine. It openswhen the ignition switch is turned tothe ON (II) position. This is similarto how an electric fuel pump worksin a gasoline-powered vehicle.

A manual shutoff valve is locatedunderneath the vehicle, near the reartire on the driver’s side. Werecommend that you locate thisvalve so you can find it quickly.To turn off the valve, turn the leverone-quarter turn clockwise. Turn itcounterclockwise to turn the valveback on.

Turn off the valve if you ever suspecta fuel leak or are involved in anaccident.

Before Driving

Fuel System Components, Fuel Cutoff System

Fuel Cutoff System Manual Shutoff Valve

12

MANUAL SHUTOFF VALVE

Tampering with, or improperlymaintaining the high-pressurefuel system can cause adangerous condition in whichyou can be seriously hurt orkilled.

Never attempt to modify the fuelsystem, and always have fuelsystem maintenance performedby an authorized Honda CivicGX dealer, or a qualified NGVtechnician.

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2008 Civic Sedan GX

－Steps for Determining Correct LoadLimit

This figure includes the total weightof all occupants, cargo, andaccessories, and the tongue load ifyou are towing a trailer.

Locate the statement ‘‘Thecombined weight of occupants andcargo should never exceed XXXkg or XXX lbs.’’ on your vehicle’splacard.

Determine the combined weightof the driver and passengers thatwill be riding in your vehicle.

Subtract the combined weight ofthe driver and passengers fromXXX kg or XXX lbs.

The maximum load for your vehicleis 850 lbs (385 kg).

See Tire And Loading Informationlabel attached to the driver’sdoorjamb.

Label Example

(3)

(2)

(1)

CONTINUED

Load Limits

Before Driving

Carrying Cargo

13

Overloading or improperloading can affect handling andstability and cause a crash inwhich you can be hurt or killed.

Follow all load limits and otherloading guidelines in thismanual.

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2008 Civic Sedan GX

－ ×

The resulting figure equals theavailable amount of cargo andluggage load capacity. Forexample, if the ‘‘XXX’’ amountequals 1,400 lbs. and there will befive 150 lb. passengers in yourvehicle, the amount of availablecargo and luggage load capacity is650 lbs.(1,400 750 (5 150) = 650 lbs.)

Determine the combined weightof luggage and cargo being loadedon the vehicle. That weight maynot safely exceed the availablecargo and luggage load capacitycalculated in Step 4.

If your vehicle will be towing atrailer, load from your trailer willbe transferred to your vehicle.Consult this manual to determinehow this reduces the availablecargo and luggage load capacity ofyour vehicle.

In addition, the total weight of thevehicle, all occupants, accessories,cargo, and trailer tongue load mustnot exceed the Gross VehicleWeight Rating (GVWR) or the GrossAxle Weight Rating (GAWR). Bothare on a label on the driver’sdoorjamb.

Example 1

Example 2

Example 3

(4)

(5)

(6)

Before Driving

Carrying Cargo

14

Passenger Weight(150 lbs x 2 = 300 lbs)

Passenger Weight(150 lbs x 4 = 600 lbs)

Passenger Weight(150 lbs x 5 = 750 lbs)

Max Load (850 lbs)

Max Load (850 lbs)

Max Load (850 lbs)

Cargo Weight(550 lbs)

Cargo Weight(250 lbs)

Cargo Weight(100 lbs)

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2008 Civic Sedan GX

－ －

The fuel tank is located in the trunk,with a partition between the fueltank and the cargo space.

When you store small items in thetrunk, secure them so they will notshift while you are driving. Looseitems can fly over the partition anddamage the fuel tank and fuelsystem components.

Do not carry large, heavy, or pointedobjects in the trunk. They maydamage the fuel tank.

Apply the parking brake.

In cold weather, turn off allelectrical accessories to reducethe drain on the battery.

Make sure the shift lever is inPark. Press on the brake pedal.

Without touching the acceleratorpedal, turn the ignition switch tothe ON (II) position. You may heara click from the in-tank fuelshutoff valve.

Make sure the malfunctionindicator lamp goes out before youturn the ignition switch to theSTART (III) position.

Turn the ignition switch to theSTART (III) position. Do not holdthe switch in the START (III)position for more than 15 secondsat a time. If the engine does notstart right away, pause for at least10 seconds before trying again.

If the outside temperature is below4°F ( 20°C), the engine may be

harder to start or may not start untiltemperatures increase. In this case,use the starting procedure for coldweather at high altitude describednext.

1.

2.

3.

4.

5.

CONTINUED

Starting the Engine

Carrying Cargo, Starting the Engine

Driving 15

The immobilizer system protects yourvehicle f rom thef t. If an improperly-coded key (or other device) is used, theengine’s f uel system is disabled. Formore inf ormation, see page of theCivic Sedan owner’s manual.

77

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2008 Civic Sedan GX

－－

－

If you regularly drive your vehicle invery cold weather [below 4°F( 20°C)], consider having anengine block heater installed. Itshould greatly improve starting invery cold weather.

Also, when driving in very coldweather, make sure that the 12 Vbattery is fully charged either bydriving several miles each day or byusing a 12 V charger to fully chargethe battery.

An engine is harder to start in coldweather. The thinner air found athigh altitude above 5,000 feet (1,600meters) adds to the problem.The unique design of a CNG enginemakes it even more difficult orimpossible to start if temperaturesdrop below 4°F ( 16°C).

Turn off all electrical accessoriesto reduce the drain on the battery.

Make sure the malfunctionindicator lamp goes out before youturn the ignition switch to theSTART (III) position.

Push the accelerator pedal half-way to the floor and hold it therewhile starting the engine. Do nothold the ignition switch in theSTART (III) position for morethan 15 seconds. When the enginestarts, release the acceleratorpedal gradually as the enginespeeds up and smooths out.

If the engine fails to start in step 3,push the accelerator pedal to thefloor and hold it there while youtry to start the engine for no morethan 15 seconds. If the enginedoes not start, return to step 3.

Your vehicle is not designed to tow atrailer; attempting to do so can voidyour warranties.

Use the following procedure:

3.

4.

1.

2.

Towing a Trailer

Starting in Cold Weather at HighAltitude (Above 5,000 feet/1,600 meters)

Starting the Engine, Towing a Trailer

Driving16

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2008 Civic Sedan GX

Your vehicle displays engine oil lifeand maintenance service items onthe information display to show youwhen you should have your dealer doengine oil replacement and indicatedmaintenance service.

Operate your vehicle onreasonable roads within the legalspeed limit.

Drive your vehicle regularly over adistance of several miles(kilometers).

Refer to the important safetyprecautions and instructions in theCivic Sedan owner’s manual.

The fuel system is under highpressure (maximum 3,600 psi/24,800kPa). It has no user-serviceable parts,and its components must not bemodified. Whenever fuel systemmaintenance is required, take yourvehicle to an authorized Honda CivicGX dealer, or a qualified NGVtechnician.

The maintenance minder assumesyou will use your vehicle as normaltransportation for passengers andtheir possessions. You should alsofollow these recommendations:

Avoid exceeding your vehicle’sload limit. This puts excess stresson the engine, brakes, and manyother parts of your vehicle. Theload limit is shown on the label onthe driver’s doorjamb.

Maintenance Minder

Maintenance 17

Tampering with, or improperlymaintaining the high-pressurefuel system can cause adangerous condition in whichyou can be seriously hurt orkilled.

Never attempt to modify the fuelsystem, and always have fuelsystem maintenance performedby an authorized Honda CivicGX dealer, or a qualified NGVtechnician.

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2008 Civic Sedan GX

If the remaining engine oil life is 15to 6 percent, you will see the engineoil life indicator every time you turnthe ignition switch to the ON (II)position. The maintenance minderindicator will also come on, and themaintenance item code(s) for otherscheduled maintenance itemsneeding service will be displayednext to the engine oil life indicator.

To see the current engine oil life,turn the ignition switch to the ON(II) position, and press the SEL/RESET button repeatedly until theengine oil life display appears.

The maintenance item code or codesindicate the main and sub itemsrequired at the time of the oil change.

Engine Oil Life Display

Maintenance Minder

Maintenance18

ENGINE OIL LIFEINDICATOR

MAINTENANCEITEM CODE(S)

MAINTENANCE MINDER INDICATORSEL/RESET BUTTON

ENGINE OIL LIFE DISPLAY

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2008 Civic Sedan GX

If you have the required servicedone but do not reset the display, orreset the display without doing theservice, the system will not show theproper maintenance intervals. Thiscan lead to serious mechanicalproblems because you will no longerhave an accurate record of whenmaintenance is needed.

When the remaining engine oil life is5 to 1 percent, you will see a‘‘SERVICE OIL LIFE’’ messagealong with the same maintenanceitem code(s), every time you turn theignition switch to the ON (II)position.

Your authorized Honda dealerknows your vehicle best and canprovide competent, efficient service.

For information on maintenancecodes, see page , or refer to theCivic Sedan owner’s manual.

For information on resetting themaintenance minder, refer to theCivic Sedan owner’s manual.

However, service at a dealer is notmandatory to keep your warrantiesin effect. Maintenance may be doneby any qualified service facility orperson who is skilled in this type ofautomotive service. Make sure tohave the service facility or personreset the display as previouslydescribed. Keep all receipts as proofof completion, and have the personwho does the work fill out yourHonda Service History booklet.Check your warranty booklet formore information.

We recommend using Honda partsand fluids whenever you havemaintenance done. These aremanufactured to the same highquality standards as the originalcomponents, so you can be confidentof their performance and durability.

20

Important MaintenancePrecautions

Maintenance Minder

Maintenance 19

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2008 Civic Sedan GX

＃

＃

－

－

＃

Maintenance Minder

Maintenance20

Maintenance Main Items

Replace engine oil

Replace engine oil and oil filter

Replace fuel filter element (low pressure)

Drain fuel filter (high pressure)

Inspect front and rear brakes

Check parking brake adjustment

Inspect these items:

Tie rod ends, steering gear box, and boots

Suspension components

Driveshaft boots

Brake hoses and lines (including ABS)

All fluid levels and condition of fluids

Exhaust system

Fuel lines and connections

Maintenance Sub Items

Rotate tires

Replace air cleaner element

Replace dust and pollen filter

Replace fuel filter element (high pressure)

Inspect drive belt

Inspect valve clearance

Inspect fuel tank

Replace transmission fluid

Replace spark plugs

Replace engine coolant

A

B

Symbol

1

2

3

4

5

Symbol1

1

2

:

If the message ‘‘SERVICE’’ does not appear more than 12 months after thedisplay is reset, change the engine oil every year.

Independent of the maintenance messages in the information display,replace the brake fluid every 3 years.Inspect idle speed every 160,000 miles (256,000 km).

If sub-item 2 does not appear more than 36 months after the display is reset,inspect the fuel tank every 3 years.

See information on maintenance and emissions warranty in the secondcolumn on page of the Civic Sedan owner’s manual.

Adjust the valves during services A, B, 1, 2, or 3 only if they are noisy.

See Fuel Tank on page for inspection and replacement information.The fuel tank should be replaced 15 years after it was manufactured.

NOTE:

2 :

228

1 :

22

If you drive in dusty conditions, replace every 15,000miles (24,000 km).

If you drive primarily in urban areas that have highconcentrations of soot in the air from industry and fromdiesel-powered vehicles, replace every 15,000 miles(24,000 km).

Main

tenance

Min

der

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2008 Civic Sedan GX

Engine oil change capacity(including filter):

The SAE number tells you the oil’sviscosity or weight. Select the oil foryour vehicle according to this chart.

5W-20 oil is formulated for year-round protection of your vehicle, toimprove cold weather starting, andto help your engine use less fuel.

Refer to the Civic Sedan owner’smanual for engine oil checking,adding, and changing procedures.

Refer to the Civic Sedan owner’smanual for engine coolant checkingand adding procedures.

Engine coolant change capacity:

Engine Oil Engine Coolant

Engine Oil, Engine Coolant

Maintenance 21

Ambient Temperature

1.40 US gal (5.3 )

3.9 US qt (3.7 )

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2008 Civic Sedan GX

The fuel tank meets the safetystandards of NGV-2/NFPA-52/DOTNHTSA FMVSS 304. The fuel tankshould be inspected every 3 yearsafter its production date. Have aqualified Honda Civic GX dealer or aqualified NGV technician inspect thefuel tank for damage or leaks.

You should also have the fuel tankinspected after a collision.

The fuel tank should be replaced 15years after it was manufactured. Theexpiration date of the fuel tank is ona label on the fuel tank and on awarning label in the enginecompartment.

Have a qualified Honda Civic GXdealer or a qualified NGV technicianreplace the fuel tank. Do not reusethe old fuel tank.

See instructions on fuel container forinspection and service life.

Fuel Tank

Maintenance22

HOOD

FUEL TANKCNG TANK EXPIRATION DATE

CNG TANK EXPIRATION DATE

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2008 Civic Sedan GX

The compact spare tire pressure is:

The recommended cold tire pressurefor most normal driving conditions isshown below.

These pressures are also given onthe tire information label on thedriver’s doorjamb.

Tire Size Cold Tire Pressurefor Normal Driving

Front/Rear:

Tires

Fuel Tank, Tires

Maintenance 23

NOTICE:

FUEL TANK

60 psi (420 kPa , 4.2 kgf/cm )

P195/65R15 89H 30 psi (210 kPa ,2.1 kgf/cm )

For other important tireinf ormation, ref er to the Civic Sedanowner’s manual.

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2008 Civic Sedan GX

Open the trunk. Remove the socket from the lightassembly by turning it one-quarterturn counterclockwise.

Remove the burned out bulb fromthe socket by pulling it straight outof its socket.

Push the new bulb straight intothe socket until it bottoms.

Pull the upper edge of the trunklining down.

Remove the screw from the centerof each trunk lining fastener, thenremove the fasteners.

1.

2.

3. 4.

5.

6.

Replacing a High-mount BrakeLight Bulb

Lights

Maintenance24

BULB

SOCKETTRUNK LINING

FASTENER

SCREW

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2008 Civic Sedan GX

Reinstall the socket. Turn itclockwise until it locks. Make surethe new bulb is working.

Reinstall the trunk lining.

If you need to park your vehicle foran extended period, refer to

in the Civic Sedanowner’s manual for information. Inaddition to these procedures, youshould do the following with yourCivic GX:

Turn the manual shutoff valve tothe OFF position (see

on page in thissupplement).

If you store your vehicle indoors, itshould be parked in a wellventilated area. We recommendthe installation of a natural gasleak detector.

After storing your vehicle for anextended period, and before startingthe engine for the first time, openthe trunk and leave it open forseveral minutes. This allows anynatural gas vapors that may havecollected in the trunk to dissipate.Insert the trunk lining fasteners

into their holes, then reinstall thefastener center screws.

Reinstall the trunk floor.

7.

8.

9.

10.12

Storing Your Vehicle

StoringYour Vehicle

ManualShutoff Valve

Lights, Storing Your Vehicle

Maintenance 25

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2008 Civic Sedan GX

Open the trunk.

Take the tool case out of the sparetire.

To change a flat tire, follow theinstructions in the Civic Sedanowner’s manual. To remove thespare tire from the trunk and tostore the flat tire, follow theinstructions on this and the nextpage.

Remove the trunk floor.

Unscrew the wing bolt and removethe spacer cone.

1. 2.

3.

4.

Removing the Spare Tire

Changing a Flat Tire

Taking Care of the Unexpected26

SPARE TIRE JACK

TOOLCASE

SPACERCONE

TOOL KIT TRUNKFLOOR

WINGBOLT

TRUNK FLOOR

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2008 Civic Sedan GX

Turn the jack’s endcounterclockwise to loosen it, thenremove the jack.

Bend the lower part of the trunklining upward and take the sparetire out of its well.

Raise the trunk floor and the lowerpart of the trunk lining as shown.Remove the rubber cap from thehole in the trunk floor, then alignthe hole in the trunk lining withthe hole in the trunk floor.

1.4. 5.

CONTINUED

Storing a Flat Tire

Changing a Flat Tire

Taking Care of the Unexpected 27

RUBBER CAPTRUNK LINING

TRUNK FLOOR

TRUNK LINING JACK

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2008 Civic Sedan GX

Place the flat tire straight up in thetrunk as shown, with the outsideof the wheel facing forward.

Remove the support plate and thewing bolt from the tool kit. Put theplate on the wing bolt.

To secure the tire, insert the wingbolt through the hole in the centerof the wheel and the trunk lining,then tighten the bolt.

Store the spacer cone and wingbolt for the spare tire in the toolkit.

You may detect a slight natural gasodor for a few moments afterrefueling. This is normal. You shouldnot be able to smell natural gas atany other time. If you do, or if youhear a hissing sound, your vehicle’sfuel system may have a leak.

2.

3.

4.

5.

If the Fuel System Has a Leak

Taking Care of the Unexpected

Changing a Flat Tire, If the Fuel System Has a Leak

28

SUPPORT PLATE

WING BOLT

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2008 Civic Sedan GX

If you smell natural gas other thanwhen refueling, or if you hear ahissing sound, follow thesedirections:

Park your vehicle in a well-ventilated area, and apply theparking brake.Keep heat, sparks, and flame away.Open all the windows and thetrunk lid for ventilation.

Turn the ignition switch to theLOCK (0) position.

Turn the manual shutoff valve tothe OFF position to turn off thenatural gas (see

on page in thissupplement).

You cannot continue driving. Yourvehicle should be towed to anauthorized Honda Civic GX dealer(see in theCivic Sedan owner’s manual).

Do not jump start your vehicle if yoususpect a natural gas leak. If yousmell natural gas or hear a hissingsound, the fuel system may have aleak that needs to be repaired by anauthorized technician.

If you suspect a leak, turn themanual shutoff valve to the OFFposition (seeon page in this supplement), andhave your vehicle towed to anauthorized Honda Civic GX dealer(see in theCivic Sedan owner’s manual).

If the fuel system is not leaking ordamaged, you can jump start thevehicle. Refer to the Civic Sedanowner’s manual for the jump startingprocedure.

12

1.

2.

3.

12

Jump Starting

Manual ShutoffValve

Emergency Towing

Manual Shutoff Valve

Emergency Towing

If the Fuel System Has a Leak, Jump Starting

Taking Care of the Unexpected 29

Compressed natural gas isflammable and highly explosive.You could be killed or seriouslyinjured if leaking natural gas isignited.

If you suspect a leak, have yourvehicle immediately inspectedand repaired by an authorizedHonda Civic GX dealer.

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2008 Civic Sedan GX

－

－

－

－－－

－－

－

－

＊

No. No.Circuits Protected Circuits ProtectedAmps. Amps.

123456789

10111213141516

1718192021222324252627282930

3132333435363738

Power WindowFuel PumpAlternatorABS/VSA UnitInjectionNot UsedTPMSNot UsedODSMETERSRSRight Headlight High BeamLeft Headlight High BeamSmall Light (Interior)Small Light (Exterior)Right Headlight Low Beam

Left Headlight Low BeamHeadlight High Beam MainSmall Lights (Main)Not UsedHeadlight Low Beam MainNot UsedNot UsedNot UsedDoor LockDriver’s Power WindowNot UsedNot UsedACCFront Passenger’s PowerWindowNot UsedRear Right Power WindowRear Left Power WindowNot UsedACC RadioHACDaytime Running LightFront Wiper

7.5 A15 A10 A

7.5 A15 A

7.5 A

7.5 A7.5 A10 A10 A10 A

7.5 A7.5 A10 A

10 A20 A15 A

20 A

20 A20 A

15 A20 A

20 A20 A

7.5 A10 A

7.5 A30 A

Optional:

To check and replace fuses, followthe instructions in the Civic Sedanowner’s manual.Since your vehicle’s interior fusesare different from the Civic Sedanfuses, determine from the chart orthe diagram on the fuse label, whichfuse or fuses control that device.

Fuses

Fuse Locations

Fuses, Fuse Locations

Taking Care of the Unexpected30

INTERIOR FUSE BOX

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2008 Civic Sedan GX

＊

＊

＊

＊

Specifications

Technical Information 31

Dimensions

Weights

Capacities

Engine

Seating Capacities

176.7 in (4,489 mm)69.0 in (1,752 mm)56.5 in (1,435 mm)106.3 in (2,700 mm)59.0 in (1,499 mm)60.2 in (1,528 mm)

3.9 US qt (3.7 )3.7 US qt (3.5 )

2.5 US qt (2.4 )6.2 US qt (5.9 )

2.6 US qt (2.5 )

1.40 US gal (5.3 )

0.11 US gal (0.4 )

LengthWidthHeightWheelbaseTrack

Gross vehicle weight rating See the certification label attachedto the driver’s doorjamb.

Fuel tank service pressure

Fuel tank capacity

EnginecoolantEngine oil

AutomatictransmissionfluidWindshield washer reservoir

Including the coolant in the reserve tank and that remaining in theengine.Reserve tank capacity:Excluding the oil remaining in the engine

3,000 psi: 7.2 gasoline gallonsequivalent (GGE)3,600 psi: 8.0 gasoline gallonsequivalent

Type

Bore x StrokeDisplacementCompression ratioSpark plugs

TotalFrontRear

IFR7F-8DS12.5 : 1

110 cu-in (1,799 cm )3.19 x 3.44 in (81.0 x 87.3 mm)

Water cooled 4-strokeSOHC i-VTEC 4-cylinder

compressed natural gas engine

523

FrontRear

1 :

2 :

3,600 psi (24,800 kPa) at 70°F(21°C)

NGK:

ChangeTotalChange

Without filterTotalChangeTotal

4.7 US qt (4.5 )

1.75 US gal (6.7 )

1

2

Including filter

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2008 Civic Sedan GX

－ －

－

－－－

－－－－－－－－－－

－－

Specifications

Technical Information32

Air Conditioning

Lights

Battery

Fuses

Fuses

Alignment

Tires

HFC-134a (R-134a)14.1 15.9 oz (400 450 g)

SP-10

12 V 60 W

12 V 8 W

12 V 21 W12 V 3 CP12 V 21 W

12 V 21 W

12 V 5 W

51 W12 V12 V

12 V

12 V

12 V

12 V

21/5 W

2 CP

5 W

8 W

21/5 W

36Ah/5HR45Ah/20HR

12 V12 V

T125/70D15 95MP195/65R15 89H

7°00’1°30’0°

0.00 in (0.0 mm)

30 psi (210 kPa , 2.1 kgf/cm )60 psi (420 kPa , 4.2 kgf/cm )

Refrigerant typeCharge quantityLubricant oil type

Headlights

Front turn signal/side marker/Parking lightsRear turn signal lightsStop/TaillightsRear side marker lightsBack-up lightsTaillightsHigh-mount brake lightLicense plate lightsCeiling lightSpotlightsTrunk light

Capacity

Interior

Under-hood See in the Civic Sedanowner’s manual.

Toe-in

Camber

Caster

Size

Pressure

0.08 in (2.0 mm)

See page 30 or the fuse labelattached to the driver’s lowercorner panel.

FrontRearFrontRearFront

HighLow

(HB3)(HB4)

Front/RearSpareFront/RearSpare

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2008 Civic Sedan GX

The publications shown below can be purchased from HelmIncorporated. You can order by phone or online:

Call Helm Inc. at 1-800-782-4356 (credit card orders only)Go online at

If you are interested in other years or models, contact Helm Inc.at 1-800-782-4356.

Purchasing Factory Authorized Manuals

Authorized Manuals

33

Form Description

2006-2008 Honda Civic 2/4 Door

Service Manual

2006-2008 Civic GX 4 Door

Service Manual Supplement

2006-2008 Honda Civic 2/4 Door

Electrical Troubleshooting Manual

2006 Model Series Honda Civic 2/4 Door

Body Repair Manual

2008 Honda Civic GX 4 Door

Owner’s Manual Supplement

2008 Honda Civic 4 Door Owner’s Manual

2008 Honda Civic Honda Service History

2008 Honda Civic 4 Door Quick Start Guide

Order Form for Previous Years-

Indicate Year and Model Desired

Publication

Form Number

61SNA05

61SNA06

61SNA05EL

61SNA30

31SNF920

31SNA620

31SNAM20

31SNAQ20

HON-R

www. helminc. com

０７／０８／０３　１２：１６：４７　３１ＳＮＦ９２０　００３４　

2008 Civic Sedan GX

Covers maintenance and recommended procedures forrepair to engine and chassis components. It is written forthe journeyman mechanic, but it is simple enough formost mechanically inclined owners to understand.

Complements the Service Manual by providing in-depthtroubleshooting information for each electrical circuit inyour vehicle.

Describes the procedures involved in the replacement ofdamaged body parts.

Authorized Manuals

Service Manual:

Electrical Troubleshooting Manual:

Body Repair Manual:

34

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2008 Civic Sedan GX

This owner’s manual should beconsidered a permanent part of thevehicle and should remain with thevehicle when it is sold.

The information and specificationsincluded in this publication were ineffect at the time of approval forprinting. Honda Motor Co., Ltd.reserves the right, however, todiscontinue or change specificationsor design at any time without noticeand without incurring any obligationwhatsoever.

Owner’s Identif ication

OWNER

ADDRESS

V. I. N.

DELIVERY DATE

DEALER NAME DEALER NO.

ADDRESS

OWNER’S SIGNATURE

DEALER’S SIGNATURE

STREET

CITY STATE/PROVINCE ZIP CODE/POSTAL CODE

(Date sold to original retail purchaser)

STREET

CITY STATE/PROVINCE ZIP CODE/POSTAL CODE

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2008 Civic Sedan GX