Honda CR-V: Emissions Controls
Honda CR-V (2006–2011) Owner's Manual / Technical Information / Emissions Controls
The burning of gasoline in your vehicle’s engine produces several byproducts.
Some of these are carbon monoxide (CO), oxides of nitrogen (NOx), and hydrocarbons (HC).
Gasoline evaporating from the tank also produces hydrocarbons. Controlling the production of NOx, CO, and HC is important to the environment.
Under certain conditions of sunlight and climate, NOx and HC react to form photochemical ‘‘smog.’’ Carbon monoxide does not contribute to smog creation, but it is a poisonous gas.
- The Clean Air Act
- Crankcase Emissions Control System
- Evaporative Emissions Control System
- Onboard Refueling Vapor Recovery
- Exhaust Emissions Controls
- Replacement Parts
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The Clean Air Act
The United States Clean Air Act*
sets standards for automobile
emissions. It also requires that
automobile manufacturers explain to
owners how their emissions controls
work and what to do to
Crankcase Emissions Control System
Your vehicle has a positive
crankcase ventilation system. This
keeps gasses that build up in the
engine’s crankcase from going into
the atmosphere. The positive
crankcase ventilation valve
Evaporative Emissions Control System
As gasoline evaporates in the fuel
tank, an evaporative emissions
control canister filled with charcoal
adsorbs the vapor. It is stored in this
canister while the engine is off. After
the en
SEE MORE:
DTC P0455/P0456: EVAP System Large Leak
Detected/Very Small Leak Detected
DTC P0455: EVAP System Large Leak
Detected
DTC P0456: EVAP System Very Small Leak
Detected
NOTICE
The fuel system is designed to allow specified
maximum vacuum and pressure conditions. Do not
deviate from the vacuum and pressure tests as
indicated in these procedures. Excessive pressure/
vacuum wou
Water Passage Replacement
1. Drain the engine coolant.
2. Remove the alternator.
3. Remove the condenser fan shroud assembly.
4. Remove the A/C compressor without disconnecting
the A/C hoses (see step 34).
5. Remove the intake manifold.
6. Remove the bolt (A) securing the connecting pipe.
7. Remove the lower radiator h
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