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


 Differential Disassembly

Special Tools Required Holder handle 07JAB-001020A Companion flange holder 07RAB-TB4010B 1. Remove the drain plug (A) and the oil filler plug (B) with sealing washers (C). 2. Raise the locknut tab (A) from the groove of the clutch guide, making sure the tab completely clears the groove to preve

 Charging System

Component Location Index CHARGING SYSTEM INDICATOR (In the gauge control module) UNDER-HOOD FUSE/RELAY BOX (Has built-in ELECTRICAL LOAD DETECTOR [ELD] UNIT) BATTERY ALTERNATOR DRIVE BELT AUTO-TENSIONER Symptom Troubleshooting Index Charging system indicator does not come

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