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
SEE MORE:
DTC P0301: No.1 Cylinder Misfire Detected
DTC P0302: No.2 Cylinder Misfire Detected
DTC P0303: No.3 Cylinder Misfire Detected
DTC P0304: No.4 Cylinder Misfire Detected
Special Tools Required
Pressure gauge adapter 07NAJ-P07010A
A/T low pressure gauge w/panel 07406-0070301
A/T pressure hose 07406
NOTE: Before you troubleshoot, record all freeze data and any on-board
snapshot, and review General Troubleshooting Information.
1. Clear the DTC with the HDS.
2. Turn the ignition switch ON.
3. Check whether DTC P2122 is indicated in the DTCs/
Freeze Data in PGM-FI Mode Menu with the HDS.
Is D
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