Mazda 3 PCV Sensor

About the piece:

The PCV (Positive Crankcase Ventilation Valve) sensor is an essential part of the Mazda engine's emission control system. It regulates the flow of exhaust gases from the crankcase to the intake manifold.

Its function:

• Regulating the flow of gases from the crankcase to be re-burned inside the engine.
• Prevents pressure build-up inside the crankcase, protecting the engine's internal components.
• Reducing harmful emissions by recycling unburned gases.

Symptoms of its damage:

• Increased oil consumption due to gas leakage.
• Decreased engine performance due to air/fuel ratio imbalance.
• Blue smoke from exhaust due to burning oil.