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Where is the PCV valve located on a 1999 Honda Civic LX?

The PCV valve on a 1999 Honda Civic LX is located on the back of the engine, close to the firewall. It is a small, cylindrical-shaped valve with a hose attached to it. The PCV valve is connected to the intake manifold and the crankcase, and it helps to control the flow of gases between the two.