Honda CR-V: 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.
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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
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
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
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NOTE:
This procedure checks the APP sensor in its fully
closed position. In any other position, the APP sensor
stores DTCs which are covered in other
troubleshooting procedures.
Check for Temporary DTCs or DTCs with the HDS
before doing this procedure. If any DTCs are
indicated, troubleshoot
You operate the in-dash disc player
with the same controls used for the
radio. To load or play discs, the
ignition switch must be in the
ACCESSORY (I) or ON (II) position.
Your vehicle also has a CD changer
that operates with the same
functions as the in-dash disc player.
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