EGR Control Valve: Efficiency & Emissions

The EGR control valve is a vital component in your vehicle's exhaust gas recirculation system, a technology implemented to reduce nitrogen oxide emissions and improve fuel efficiency. This valve strategically recirculates a portion of exhaust gases back into the engine's intake system, effectively lowering combustion temperature and minimizing harmful emissions.

How It Works

The EGR control valve regulates the flow of exhaust gases that are rerouted from the exhaust manifold back into the intake manifold. Operated by either vacuum or electronic control, this valve opens and closes based on engine demand, allowing precise control over the volume of recirculated gases. This process contributes to better engine performance, reduced emissions, and improved fuel economy.

Consequences of a Broken EGR Valve

When the EGR control valve malfunctions, you may experience a suite of engine performance issues including rough idling, increased fuel consumption, and elevated emissions levels. Additionally, the "Check Engine" light may illuminate, and the vehicle may fail emissions testing. Ignoring a faulty EGR valve could lead to significant long-term engine damage due to increased combustion temperatures.

Compatible Models

• Legacy
• Forester
• Wrx/Levorg
• Wrx