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25
Fuel Leaks
Handling the Unexpected
If a Fuel Leak is Detected
If you smell natural gas or hear a hissing sound, except when refueling, the fuel
system may have a leak. If a Fuel Leak is Detected
WARNING
Compressed natural gas is flammable and
highly explosive. You could be killed or
seriously injured if leaking natural gas is
ignited.
If you suspect a leak, have your vehicle
immediately inspected and repaired by an
authorized CNG dealer.
Do not jump start your vehicle if you suspect a fuel
gas leak.
Turning Off the Manual Shut-Off Valve
We recommend that you locate the valve before
driving so that you can turn it off quickly if
ne ce s s ar y.
Turn off the valve if you ever suspect a fuel leak or
are involved in an accident.
Turn the manual shut-off valve to OFF also when
you are storing your vehicle for an extended period.
Turning Off the Manual Shut-Off Valve
4. Turn the manual shut-off valve one-quarter
turn clockwise (located as shown).
The valve is turned to OFF.
5. Call a professional towing service.
You cannot continue driving. Have the
vehicle towed to an authorized Civic
Natural Gas dealer.
Emergency Towing
P. 321, Owner's Manual
1. Park your vehicle outside in a well-ventilated area. Set the parking brake.
Keep away from heat, sparks, and flame.
2. Open all the windows and trunk for ventilation.
3. Turn the ignition to LOCK
0.
Manual Shut-Off
Valve
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Page 26 of 33

Indicator, Coming On/Blinking
26
Handling the Unexpected
If the Malfunction Indicator Lamp Comes On or
Blinks
If the Malfunction Indicator Lamp Comes On or Blinks
NOTICE
If you drive with the malfunction indicator lamp on,
the emissions control system and the engine could
be damaged.
If the malfunction indicator lamp blinks again when
restarting the engine, drive to the nearest dealer at
31 mph (50 km/h) or less for an inspection. Reasons for the indicator lamp to come on or blink
Comes on when there is a problem with the engine emissions control
•
system, or the fuel system.
Blinks when engine misfiring is detected.
•
What to do when the indicator lamp comes on
Avoid high speeds and immediately get your vehicle inspected at an
authorized Civic Natural Gas dealer.
What to do when the indicator lamp blinks
Park the vehicle in a safe place with no flammable items and wait at
least ten minutes or more with the engine stopped until it cools.
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2012 Civic Natural Gas Vehicle
Page 27 of 33
27
Fuses
Continued
Handling the Unexpected
To check and replace fuses, follow the instructions in the Owner’s Manual.
Since your vehicle’s fuses are different from the standard gasoline model’s fuses,
determine from the chart or the diagram on the fuse box label, which fuse or fuses
control that device.
Current (Amps) ratings in brackets indicate a fuse in that location for a device that
may not be equipped on your vehicle.
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28
Handling the Unexpected
Fuses
Engine Compartment
Circuit ProtectedAmps
1 EPS
70 A
− −
ABS/ VSA Motor 30 A ABS/ VSA FSR 30 A − −
Main Fuse 100 A
2 IG Main
50 A
Fuse Box Main 60 A
Fuse Box Main 2 60 A Headlight Main 30 A − −
Rear Defogger 30 A − −
Blower 40 A
− −
Sub Fan Motor 20 A
Main Fan Motor 20 A
3 − −
4 Left Headlight Low Beam 10 A
5 Starter DIAG, ST MG 7.5 A
6 Right Headlight Low Beam 10 A
7 − −
8 − −
9 − −
10 − −
Circuit Protected Amps
11 Oil Level 7.5 A
12 − −
13 − −
14 Hazard 10 A
15 FI Sub 15 A
16 IG Coil 15 A
17 Stop 15 A
18 Horn 10 A
19 − −
20 INJ (15 A)
21 IGP 15 A
22 DBW 15 A
23 H/L LO 20 A
24 − −
25 MG Clutch 7.5 A
26 − −
27 SMALL 20 A
28 Interior Lights 7.5 A
29 Backup 10 A Interior
Circuit Protected Amps
1 − −
2 ACG 15 A
3 SRS 10 A
4 Fuel Pump 15 A
5 Meter 7.5 A
6 Power Window 7.5 A
7 VB SOL (15 A)
8 Door Lock Motor 2 (Unlock) 15 A
9 Door Lock Motor 1 (Unlock) 15 A
10 − −
11 − −
12 − −
13 − −
14 − −
15 Driver's Door Lock Motor
(Unlock) (10 A)
16 − −
17 − −
18 − −
19 ACC 7.5 A
20 ACC Key Lock 7.5 A
21 Daytime Running Lights 7.5 A
22 HAC 7.5 A
23 − −
24 ABS/ VSA 7.5 A
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2012 Civic Natural Gas Vehicle
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29
Handling the Unexpected
Fuses
Circuit ProtectedAmps
25 − −
26 − −
27 Accessory Power Socket
(Front) 15 A
28 Washer 15 A
29 ODS 7.5 A
30 Driver's Door Lock Motor
(Lock) (10 A)
31 − −
32 Door Lock Motor 2 (Lock) 15 A
33 Door Lock Motor 1 (Lock) 15 A
34 Small Lights 7.5 A
35 Illumination 7.5 A
36 − −
37 − −
38 Left Headlight High Beam 10 A
39 Right Headlight High Beam 10 A
40 TPMS (7.5 A)
41 Door Lock 20 A
42 Driver's Power Window 20 A
43 Rear Passenger's Side Power
Window (20 A)
44 Front Passenger's Side
Power Window 20 A
45 Rear Driver's Side Power
Window (20 A)
46 Wiper 30 A
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2012 Civic Natural Gas Vehicle
Page 30 of 33

Specifications
30
Information
Vehicle Specifications
ModelHonda Civic 4-Door Natural Gas
No. of Passengers:
Front
Rear
Total 2
3
5
Weights:
Gross Vehicle Weight
Rating 3,814 lbs (1,730 kg)
Gross A xle Weight
Rating (Front) 2,029 lbs (920 kg)
Gross A xle Weight
Rating (Rear) 1,852 lbs (840 kg)
Air Conditioning:
Refrigerant Type
Charge Quantity
Lubricant Type HFC-134a (R-134a)
13.2 – 15.0 oz (375 – 425 g)
SP-10
Engine Specifications
Displacement
110 cu-in (1,798 cm3)
Spark Plugs NGKSILKR8B8DS
Fuel
Fuel Tank
Service Pressure 3,600 psi (24,800 kPa) at 70°F (21°C)
Fuel Tank
Capacity 3,000 psi: 7.2 GGE (Gasoline Gallon
Equivalent)
3,600 psi: 8.0 GGE (Gasoline Gallon
Equivalent)
Battery
Capacity
38AH(5)/47AH(20)
Washer Fluid
Tank Capacity 2.6 US qt (2.5 ℓ)
Light Bulbs
Headlights (Low Beam) 51W (HB4)
Headlights (High Beam) 60W (HB3)
Front Turn Signal/Parking/Side
Marker Lights 28/8W
Brake/Taillights 21/ 5W
Back-Up Lights 21W
Rear Turn Signal Lights 21W (Amber)
Rear Side Marker Lights 3CP
High-Mount Brake Light 21W
Rear License Plate Light 5W
Trunk Light 5W
Interior Lights
Map Lights
Ceiling Light 8W
8W
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Specifications
31
Information
Brake Fluid
SpecifiedHonda Heavy Duty Brake Fluid DOT 3
Automatic Transmission Fluid
SpecifiedHonda ATF DW-1
(automatic transmission fluid)
Capacity Change 2.5 US qt (2.4 ℓ)
Engine Oil
Recommended • Genuine Honda Motor Oil 0W-20
• API Premium-grade 0W-20
detergent oil
Capacity Change
3.7 US qt (3.5 ℓ)
Change
including
filter 3.9 US qt (3.7 ℓ)
Engine Coolant
Specified
Honda Long-Life Antifreeze/Coolant
Ty pe2
Ratio 50/50 with distilled water
Capacity 1.45 US gal (5.50 ℓ)
(change including the remaining
0.125 US gal (0.475 ℓ) in the reserve tank)
Tire
RegularSize
P195/65R15 89H
Pressure
psi (kPa[kgf/cm2]) 30 (210 [2.1])
Compact
Spare Size
T135/80D15 99M
Pressure
psi (kPa[kgf/cm
2]) 60 (420 [4.2])
Wheel Size Regular
15 x 6J
Compact Spare 15 x 4T
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Page 32 of 33
Fuel System
32
Information
System Components
Fuel Feed Line
Fuel Pressure
Regulator Fuel Tank
Fuel Receptacle
Fuel Filter
(Low Pressure) Fuel Injector
Fuel Filter
(High Pressure) Manual Shut-Off
Valve System Components
Your vehicle’s fuel system includes a fuel tank, a
fuel pressure regulator, a manual shut-off valve,
high pressure fuel lines, and other components that
comply with NFPA-52 standards.
The system in your vehicle, including the tank
and hoses, has been designed to hold gas at this
pressure. It has also been tested for safety. You
should never smell gas or hear a hissing sound
unless you are refueling.
Never modify or replace any original components or
parts with those specified for a gasoline vehicle.
Improper parts or components can damage your
vehicle’s fuel system and affect your vehicle’s safety
performance.
Unlike some gasoline models, your vehicle’s rear
seat-back cannot be folded down.
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