Exhaust gas recirculation is a technology for reducing nitrogen oxide emissions from internal combustion engines. It is used in petrol/gasoline, diesel and some hydrogen engines. The technique works by recirculating some of the exhaust gas back into the engine’s cylinders. It also reduces harmful nitrogen oxide emissions from the air.


The Dorman EGR valve is an important component of your vehicle’s emissions control system. It regulates the temperature of the engine and prevents nitrogen related gas formation. Without a functioning EGR valve, your car could fail emissions tests. However, there are parts and accessories available to repair or replace the valve.

A malfunctioning EGR valve can cause your check engine light to illuminate, so you’ll want to make sure you fix the problem as quickly as possible. A malfunctioning EGR valve will decrease the life of your engine and increase harmful emissions. To fix your EGR valve, you’ll need to diagnose the problem.


A function of an EGR valve is to control the flow of exhaust gases from an engine. The EGR valve’s opening is controlled by a control system. Flow rates through the EGR valve are limited to 20% of the intake manifold’s flow. The EGR valve must be opened only when necessary.

The intake oxygen sensor provides feedback to the EGR control algorithm. However, https://evrproducts.com/products/rubber-duckbill-check-valves/ the location of the sensor introduces significant dead time delays. This limits the ability of the control algorithm to rely on feedback measurements. Because of this, it is imperative to use a feed-forward algorithm for the control of EGR valves.


EGR valves come in many different types, including vacuum-operated and electronic-controlled models. The former type is simpler and cheaper to install, while the latter features a computer-controlled solenoid and electrical connection (2-6 pins). However, modern EGR valves can cost more than $150 each. If you’re replacing your valve yourself, it is a good idea to compare multiple quotes and shop around for the best deal.

The cost of an EGR valve replacement depends on several factors, including the vehicle’s model and year. In general, a new valve will cost between $150 and $400, depending on which part you need and the amount of labor that is involved.


The EGR valve is responsible for re-directing exhaust gases. When it fails to do this, it can pollute the environment and cause damage to the injection system. It is important to maintain the EGR valve in the same way as you would your catalytic converter or DPF. Likewise, it is not advisable to take short urban trips with the engine running at low revs. It is better to drive on a motorway instead so that the engine can run at normal speed.

You should clean the EGR valve regularly as recommended by your car’s manufacturer. If the valve is not functioning properly, you may need to replace it. This should be performed by a certified automotive technician.

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