The EGR valve is an emission control device

The EGR valve is an emission control device that is installed in your vehicle’s engine. It helps maintain the combustion chamber’s temperature and reduce nitrogen oxides. The valve works by diluting the incoming air/fuel mixture before it enters the combustion chamber, resulting in a more efficient combustion process and reduced nitrogen oxides and spark knock. The EGR valve is typically located on the intake manifold. When it malfunctions, it can cause the check engine light to illuminate. Eventually, it will impact the performance of the vehicle, and may require repair or replacement.

Exhaust gas recirculation valve (EGR)

The Exhaust Gas Recirculation Valve (EGR) is a part of your vehicle’s emissions system. It works by redirecting a portion of the exhaust gas back into the engine’s intake manifold. This part of the engine controls the amount of nitrogen oxides emitted during engine operation. The recirculated exhaust gases help cool the combustion chamber, which reduces the production of dangerous Nitrous Oxides.

The EGR valve opens when exhaust gas pressure is higher than intake gas pressure. When it opens, exhaust gas flows into the engine’s intake passageway. It is actuated by one or more poppet valves, which are similar to those in the cylinder heads. The valves can be actuated using a variety of mechanisms, including a rocker arm acting on the valve stem.


The EGR valve is a part of a car’s exhaust system. Its main function is to reduce exhaust gas emissions and improve engine efficiency by recirculating a portion of the exhaust gas back into the combustion chamber. This process helps to lower the overall combustion temperature and reduces the amount of NOx that is emitted during combustion. A car’s EGR valve is triggered whenever the vehicle accelerates and closes when the speed drops below a certain level.

In addition to this, the EGR valve also reduces the noise from the exhaust gas by reducing the amplitude of exhaust pressure pulsations. ThisĀ is accomplished by adjusting the valve angle, which controls the mass flow of the exhaust gas. The main frequency of these pulsations depends on engine speed and engine loads.


Regular maintenance of the EGR valve can improve the performance of your car. It helps in smoothing the acceleration process and reducing knocking. If your car has a faulty EGR valve, it may lead to a check engine light. In order to prevent this, you must regularly clean it.

The process for cleaning an EGR valve is divided into two steps, depending on the model of your car. First, you should remove the vacuum hose. You can use a pipe cleaner or carburetor cleaner to clean the valve from carbon buildup.


If you notice your engine using too much fuel or you smell gasoline when you drive, you may have an EGR valve issue. This issue can cause an exhaust leak or cause the engine management light to illuminate. It can also cause increased emissions, which can lead to failed emissions tests and MOT tests.

While a stuck EGR valve may not be the main problem, it can be a sign of other problems in your car. Your vehicle may be stalling or exhibiting other symptoms such as a rough idle or a misfire. If you notice these symptoms, you may need to replace the EGR valve or clean the intake manifold passages.


If you’re considering replacing the EGR valve in your car, you’ll need to find out how much it costs to do it. The price will vary depending on what you need to do. There are two main types of EGR valves: vacuum-operated and electronically controlled. Vacuum-operated ones are easier to work with and are less expensive. Electronically controlled versions, on the other hand, have a computer-controlled solenoid and electrical connections (2-6 pins), and they can cost more than $150 each.

While the replacement part alone can run anywhere from $40 to $150, a qualified mechanic can install it in a few hours for as little as $100. The labor itself will cost anywhere from five to twenty dollars.