The components of the crankcase emission control system require regular checks to ensure the hoses are clear and undamaged, with attention to their fitted positions during removal. For evaporative emission control, if a fault is suspected, hoses should be disconnected from the charcoal canister and purge control valve to check for blockages. Renewal of the charcoal canister, located under the car near the fuel tank, involves jacking up the rear, disconnecting hoses, removing the canister, and refitting in reverse order. The purge control solenoid valve, found in the rear right-hand side of the engine compartment for 1.2 litre models or on the inlet manifold for 1.6 litre models, requires disconnection of the wiring and hoses before removal and reinstallation. Exhaust emission control involves checking the catalytic converter's performance with an exhaust gas analyser; if CO levels are high, a Nissan dealer should inspect the fuel injection and ignition systems. Renewal of the catalytic converter and oxygen sensors, which are sensitive and should not be dropped or cleaned, involves jacking up the vehicle, disconnecting wiring, unscrewing the sensor, and applying high-temperature grease before reinstallation, ensuring proper routing of the wiring to avoid contact with hot components.