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The PCV Valve in Dodge Grand Caravan is one of the main components of the emission control system and also plays the role of improving the performance of the automobile engine. The PCV Valve aids in the return of combustion byproduct gases from the crankcase into the engine's combustion chambers thus preventing harm to the environment and the build up of undesirable engine damaging oil sludge. Due to the relation of its operation with intake manifold vacuum conditions, the PCV Valve closes the gas flow at idle to prevent lean running of the engine and opens the passages at higher RPMs or under the load to deal with a higher level of blow-by gases. This mechanism makes crankcase gases to be well ventilated without any factor affecting the engine operation. Moreover, it prevents positive pressure occurrence on the crankcase in which the PCV Valve performs a flame arrester The crankcase pressure hence should be well managed to improve the engine power by enhancing the compression. In conclusion, the importance of proper care and proper check-up of the Dodge Grand Caravan PCV Valve cannot be overemphasized as reparation costs are very huge and it aids in the efficiency of the vehicle.