2005 HONDA CIVIC SEDAN catalytic converter

The odometer shows the total dis-
tance your vehicle has been driven.
It measures miles in U.S. models and
kilometers in Canadian models.
It is illegal under U.S. f ederal law and
Canadian provincial regulations to
disconnect, reset, or alter the
odometer with the intent to change
the number of miles or kilometers
indicated.This meter shows the number of
miles (U.S.) or kilometers (Canada)
driven since you last reset it.
There are two trip meters: Trip A
and Trip B. Switch between these
displays by pressing the Select/
Reset button repeatedly.Each trip meter works independently,
so you can keep track of two
dif f erent distances.
To reset a trip meter, display it, and
then press and hold the Select/Reset
button until the number resets to
‘‘0.0.’’ Both trip meters will reset if
the vehicle’s battery goes dead or is
disconnected.
This shows how much f uel you have.
It may show slightly more or less
than the actual amount. The needle
returns to the bottom after you turn
of f the ignition.
Gauges
Odometer
T rip Meter Fuel Gauge
U.S. L X, EX and Canadian L X-G and Si models
Inst rument s and Cont rols
61
ODOMETER/TRIP METER SELECT/RESET KNOB
The U.S. instrument
panel is shown TACHOMETER
SPEEDOMETER TEMPERATURE GAUGE
FUEL GAUGE
Avoid driving with an extremely low
f uel level. Running out of f uel could
cause the engine to misf ire, damaging
the catalytic converter.

Remove the key from the Shift
Lock Release slot, then install the
cover. Make sure the notch on the
cover is on the lef t side.
Return the key to the ignition
switch, press the brake pedal, and
restart the engine.Never park over dry leaves, tall
grass, or other f lammable
materials. The hot three way
catalytic converter could cause
these materials to catch on fire.
Make sure the parking brake is
f ully released bef ore driving away.
Driving with the parking brake
partially set can overheat or
damage the rear brakes.
Always use the parking brake when
you park your vehicle. Make sure
the parking brake is set f irmly or
your vehicle may roll if it is on an
incline.
If your vehicle has an automatic
transmission, set the parking brake
bef ore you put the transmission in
Park. This keeps the vehicle f rom
moving and putting pressure on the
parking mechanism in the
transmission.
Lock the doors. Place any packages, valuables, etc.,
in the trunk or take them with you. Turn of f the lights.
Make sure the moonroof and the
windows are closed. If the vehicle is f acing uphill, turn
the f ront wheels away f rom the
curb. If you have a manual
transmission, put it in f irst gear.
If the vehicle is f acing downhill,
turn the front wheels toward the
curb. If you have a manual
transmission, put it in reverse gear.
If you need to use the Shif t Lock
Release, it means your vehicle is
developing a problem. Have it
checked by your dealer. 6.
Automatic Transmission, Parking
Parking
Parking T ips
Driving
141
RELEASE BUTTON
SHIFT LOCK RELEASE SLOT

Thediagramsinthissectiongive
you the dimensions and capacities of
your vehicle, and the locations of the
identif ication numbers. It also
includes inf ormation you should
know about your vehicle’s tires and
emissions control systems.................
Identif ication Numbers . 206
................................
Specif ications .208
DOT Tire Quality Grading ......................
(U.S. Vehicles) .210
.................................
Treadwear .210
......................................
Traction .210
.............................
Temperature .211
.................................
Tire Labeling .212
.........................
Oxygenated Fuels .213
......
Driving in Foreign Countries . 214.......................
Emissions Controls .215
.....................
The Clean Air Act .215
Crankcase Emissions Control ....................................
System .215
Evaporative Emissions Control ....................................
System .215
Onboard Ref ueling Vapor ................................
Recovery .215
...
Exhaust Emissions Controls . 216
....................
PGM-FI System .216
Ignition Timing Control ................................
System .216
Exhaust Gas Recirculation ...................
(EGR) System . 216
Three Way Catalytic ...........................
Converter .216
....................
Replacement Parts . 216
..
Three Way Catalytic Converter . 217
..............
State Emissions Testing . 218
T echnical Inf ormat ion
T echnical Inf ormation
205

If you are planning to take your
Honda outside the U.S. or Canada,
contact the tourist bureaus in the
areas you will be traveling in to f ind
out about the availability of unleaded
gasoline with the proper octane
rating.
If unleaded gasoline is not available,
be aware that using leaded gasoline
in your Honda will af f ect perf or-
mance and fuel mileage, and damage
its emissions controls. It will no
longer comply with U.S. and
Canadian emissions regulations, and
will be illegal to operate in North
America. To bring your vehicle back
into compliance will require the re-
placement of several components,
such as the oxygen sensors and the
three way catalytic converter. These
replacements are not covered under
warranty.
Driving in Foreign Countries
214

The exhaust emissions controls
include three or f our systems: PGM-
FI, ignition timing control, exhaust
gas recirculation (SOHC VTEC
engine only), and three way catalytic
converter. These three or f our
systems work together to control the
engine’s combustion and minimize
the amount of HC, CO, and NOx that
comes out the tailpipe. The exhaust
emissions control systems are
separate f rom the crankcase and
evaporative emissions control
systems.
The PGM-FI System uses sequential
multiport f uel injection.
It has three subsystems: air intake,
engine control, and f uel control. The
powertrain control module (PCM) in
automatic transmission vehicles or
the engine control module (ECM) in
manual transmission vehicles uses
various sensors to determine howmuch air is going into the engine. It
then controls how much f uel to inject
under all operating conditions.
The emissions control systems are
designed and certif ied to work to-
gether in reducing emissions to
levels that comply with the Clean Air
Act. To make sure the emissions
remain low, you should use only new
Honda replacement parts or their
equivalent f or repairs. Using lower
qualitypartsmayincreasethe
emissions f rom your vehicle.
The emissions control systems are
covered by warranties separate from
the rest of your vehicle. Read your
warranty manual f or more informa-
tion.
The three way catalytic converter is
in the exhaust system. Through
chemical reactions, it converts HC,
CO, and NOx in the engine’s exhaust
to carbon dioxide (CO ), nitrogen
(N ), and water vapor. The exhaust gas recirculation (EGR)
system takes some of the exhaust
gas and routes it back into the intake
manif old. Adding exhaust gas to the
air/f uel mixture reduces the amount
of NOx produced when the f uel is
burned. This system constantly adjusts the
ignition timing, reducing the amount
of HC, CO, and NOx produced.
2
2
Exhaust Emissions Controls Replacement Parts
PGM-FI Syst em
Three Way Catalytic Converter
Exhaust Gas Recirculat ion (EGR)
Syst em
Ignit ion T iming Cont rol Syst em
Emissions Cont rols
216

The three way catalytic converter
contains precious metals that serve
as catalysts, promoting chemical
reactions to convert the exhaust
gasses without af f ecting the metals.
The catalytic converter is ref erred to
as a three-way catalyst, since it acts
on HC, CO, and NOx. A replacement
unit must be an original Honda part
or its equivalent.Always use unleaded gasoline.
Even a small amount of leaded
gasoline can contaminate the
catalyst metals, making the three
way catalytic converter inef f ective.Keep the engine tuned-up.
The three way catalytic converter
must operate at a high temperature
for the chemical reactions to take
place. It can set on f ire any com-
bustible materials that come near it.
Parkyourvehicleawayfromhigh
grass, dry leaves, or other f lamma-
bles. A defective three way catalytic
converter contributes to air pollution,
and can impair your engine’s per-
f ormance. Follow these guidelines to
protect your vehicle’s three way
catalytic converter.
Have your vehicle diagnosed and
repaired if it is misf iring, back-
f iring, stalling, or otherwise not
running properly.
(DX, LX models)
(EX, Canadian Si models)
Three Way Catalytic Converter
T echnical Inf ormation
217
THREE WAY CATALYTIC CONVERTER THREE WAY CATALYTIC CONVERTER

CONT INUED
.....................................
Snow Tires .176
..................................
Sound System .92
Spare Tire ......................................
Inf lating .182
............................
Specif ications .209
....................
Specif ications Charts . 208
................................
Speed Control .117
.........................................
Spotlights .84
..........
SRS, Additional Inf ormation . 23
...
Additional Safety Precautions . 29
.............................
Airbag Service .28
How the Side Airbag Cutof f ......................
Indicator Works .28
How the SRS Indicator .......................................
Works .27
How Your Front Airbags .........................................
Work .24
...
How Your Side Airbags Work . 26
........................
SRS Components .23
.............................
SRS Indicator .27 ,57
....
START (Ignition Key Position) . 71
..............
State Emissions Testing . 218
.......................
Starting the Engine .135
In Cold Weather at High ..................................
Altitude .135
................
With a Dead Battery . 190 ........
Steam Coming f rom Engine . 191
Steering Wheel ..................................
Adjustment .68
.............
Anti-theft Column Lock . 71
.....................
Stereo Sound System .92
....................
Storing Your Vehicle .179
Supplemental Restraint ................................
System .11, 23
......................................
Servicing .28
.........................
SRS Indicator .27 ,57
...................
System Components . 23
..................................
Synthetic Oil .155
Taillights, Changing ..................................
Bulbs .166, 167
.
Taking Care of the Unexpected . 181
....................................
Tape Player .112
Technical Descriptions ......
DOT Tire Quality Grading . 210
.....
Emissions Control Systems . 215
.....................
Oxygenated Fuels .213
..........
State Emissions Testing . 218
Three Way Catalytic ...............................
Converter .217 .................................
Tire Labeling .212
.......................
Temperature Gauge .62
.....................
Tether Anchor Points .42
............................
Thef t Protection .114
..
Three Way Catalytic Converter . 217
..........................
Time, Setting the .115
....................................
Timing Belt .160
....................................
Tire Chains .177
.........
Tire, How to Change a Flat . 183
...........................
Tire Inf ormation .210
...............................................
Tires .171
..............................
Air Pressure .173
.........................
Checking Wear .174
..........................
Compact Spare .182
......
DOT Tire Quality Grading . 210
......................................
Inf lation .172
..................................
Inspection .174
..............................
Maintenance .174
...................................
Replacing .175
......................................
Rotating .175
...........................................
Snow .176
............................
Specif ications .209
................................
Tire Chains .177
...................
Tools, Tire Changing . 183
Index
T
INDEX
VII