Glossary of Auto Terms

DriverSide's Car Dictionary has the most comprehensive definitions of automotive terms. This auto glossary can help you decipher what your mechanic is fixing and what the purpose or function of the particular auto part or accessory is for. We have taken the mystery out of automotive service jargon, so that you don't have to.


PCV Valve

Part of the Positive Crankcase Ventilation system used mainly on older vehicles. When this valve is open, it sucks unburned fuel vapor from the crankcase to the intake manifold for a second burning, and helps lower emissions. Replacing them is inexpensive, and a good idea on older vehicles whose PCV valve is older or of unknown age.

See Also:
Throttle Sensor
Spark Plug Wire
Oil Light
Spark Retard
Negative Terminal
Engine Computer

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