Back to all

What Is an EGR Valve? (EGR Valve Service)

April 4, 2021

If you've ever felt your vehicle hesitate, go, then hesitate again, you might think there's something wrong with the transmission.  After all, it's not moving smoothly  down the road.  But there are plenty of malfunctions that can cause those symptoms, one of them being something you may have never heard of: the EGR valve.

EGR stands for Exhaust Gas Recirculation. It's a system that channels small amounts of exhaust back into the engine to cool down the cylinders and reduce polluting gases.  Those include nitrogen oxides that can cause smog. The EGR valve regulates how much of the vehicle's exhaust gas is recirculated. After years and long distances traveled, that valve can get clogged or fail. Sometimes the EGR valve can stick open.  When the EGR valve isn't working properly, your vehicle can start releasing those nitrogen oxides and pollute the air.

The symptoms of a malfunctioning EGR valve include:

  • Engine losing power
  • Engine idling roughly
  • Pinging and knocking sounds in the engine
  • Stalling and hesitation
  • Fuel economy decreasing
  • Check Engine light illuminated

 

Depending on its condition, the EGR valve can be cleaned or it may need to be replaced.  Consult with your service advisor to see what options are recommended to you.

The EGR system is part of your vehicle's pollution and emissions control equipment. If you care about keeping our planet's atmosphere clean, you'll want to make sure it's doing its job—for everyone's benefit.

TLC Custom Exhaust Brakes & Tires
1735 N Main St
Royal Oak, Michigan 48067
248-541-8300
http://www.tlcautocareroyaloak.com

Need Service?

More articles from TLC Auto Care

You Are the Fluid Detective! (Leaking Fluids)

March 15, 2026

When you see some liquid sitting underneath your vehicle, your mind starts churning. Is that normal? Is that something serious, or did I just spill my drink? Heres a quick list of what those fluids look, smell and feel like, as well as what they might be. No, we dont recommend you taste them to ... More

Don?t Be Hosed (Radiator Hose Replacement)

March 8, 2026

If you are like most drivers, you dont worry too much about what shape your radiator hoses are in. But they are a vital part of your coolant system, helping carry engine coolant from the hot engine to where it is cooled off in the radiator. When the cooling system has a problem, you will likel... More

Avoiding Exhaustion (EGR Valve Replacement)

March 1, 2026

No, ERG isnt the sound a pirate makes. Its a part in your vehicle that recirculates exhaust gas to reduce certain gases and pollutants in the atmosphere. In fact, ERG stands for Exhaust Gas Recirculation. One gas our vehicles may make when they burn fuel is nitric oxide, which can play a big ro... More