OEM Vacuum Valve (Yellow/Grey) 1268000078

A vacuum solenoid valve in a car is an essential component of the engine's vacuum system. It works by controlling the flow of vacuum pressure to various engine components, such as the EGR (Exhaust Gas Recirculation) valve or the HVAC (Heating, Ventilation, and Air Conditioning) system.

The vacuum solenoid valve is typically controlled by the car's engine control unit (ECU) based on various engine conditions and sensor inputs. When the ECU determines that vacuum pressure is needed or needs to be diverted, it sends an electrical signal to the solenoid valve, which then opens or closes accordingly to regulate the vacuum flow. For example, it may open to allow vacuum pressure to reach the EGR valve during specific driving conditions to reduce emissions, or it may close to direct the vacuum pressure to the HVAC system for climate control purposes.