Were is the PCV valve in a Honda 2004?

Hello,

The PCV valve is typically located on the upper right corner of the intake manifold. For 2004 Honda vehicles, the precise location of the PCV valve will vary depending on the model. However, the PCV valve on a 2004 Honda Civic is part of the breather tube system and is located in between the breather cover and the PCV tube.

For its precise location, refer to the diagram posted in the 'Related links and sources' portion of this post below. The PCV valve is ref # 4 in the aforementioned diagram.