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.


 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


 Replacing a Front Turn Signal Light Bulb

1. Open the hood. To change the turn signal bulb on the driver’s side, remove the engine coolant reserve tank by pulling it out of its holder. 2. Remove the socket from the headlight assembly by turning it one-quarter turn counterclockwise. 3. Pull the bulb straight out of its s

 Steering Wheel Adjustment

Make any steering wheel adjustment before you start driving. Adjusting the steering wheel position while driving may cause you to lose control of the vehicle and be seriously injured in a crash. Adjust the steering wheel only when the vehicle is stopped. 1. Push the lever under th

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