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


 DTC U0028: F-CAN Malfunction (BUS-OFF (PCM) )

NOTE: Before you troubleshoot, record all freeze data and any on-board snapshot, and review the general troubleshooting information. 1. Turn the ignition switch ON (II). 2. Clear the DTC with the HDS. 3. Check for Temporary DTCs or DTCs with the HDS. Is DTC U0028 indicated? YES-Update the PCM i

 Turn Signal and Headlights

1. Turn Signal 2. OFF 3. Parking and interior lights 4. AUTO 5. Headlights on 6. High Beams 7. Flash high beams *: If equipped Turn Signal - Push down on the lever to signal a left turn and up to signal a right turn. To signal a lane change, push lightly on the lever, and hold it

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