he PCV valve is an important part of the engine even though it may not look it. PCV stands for Positive Crankcase Ventilation. The PCV valve was the first of the emission system components to be put into production vehicles. Critical to Emissions Compliance Testing, FRAM PCV Valves can help ensure that your vehicle meets the emissions standards. Regular maintenance helps avoid poor engine performance, rough idling, and stalling. Image(s) and description shown is a generic representation of a FRAM automotive-headlight-units part. Your part may or may not look the same.