How To Replace The EGR Valve On Ford Mustang (2000-2015)


Are you a 2000 – 2015 Ford Mustang owner with a faulty EGR valve? I am sorry to hear that your EGR valve is faulty. However, I have some good news for you. Instead of spending up to $500 on having a mechanic replace your EGR valve, you can do it yourself and save a ton of money.

In this blog post, I will be talking about what the EGR valve is used for in vehicles and how to replace the EGR valve in the 2000 – 2015 Ford Mustang.

What is The EGR Valve Used For In Vehicles

The EGR stands for exhaust gas recirculation and is used to reduce nitrogen oxide emissions from vehicles. EGR is currently being used on both gasoline and diesel engines. This is pretty useful, especially for diesel engines since they produce way more nitrogen oxide than gasoline engines.

The EGR valve is able to reduce the nitrogen oxide emissions by up to 30% by simply recirculating some of the exhaust gases back into the combustion chamber to be burned again. However, the downside is that the EGR valve is only activated at certain speeds. This is mainly because the recirculated exhaust gases are hot and the engine requires fresh cold air for best performance. This is why the EGR valve only activates when your engine is between 1000 RPMs and 1500 RPMs.

The EGR has a valve that opens and closes depending on how much throttle you apply. When the vehicle is driving on low RPMs, the EGR valve is completely open and allows more exhaust gases to be recirculated back into the combustion chamber. However, if you apply full throttle, the EGR valve is completely closed and no exhaust gases are recirculated back into the combustion chamber.

How Long Can You Drive With Bad Lif...
How Long Can You Drive With Bad Lifters?

Bigger engines usually have one EGR valve on each side. Also, in high-performance engines where temperatures are constantly high, the EGR system also has a cooler. A faulty EGR valve causes all sorts of problems including a check engine light, reduced engine power, and black smoke from the exhaust pipe.

How To Replace The EGR Valve On Ford Mustang (2000-2015)

How To Replace The EGR Valve On Ford Mustang (2000-2015)

Replacing an EGR valve on the 2000 to 2015 Ford Mustang requires basic skills. However, without the proper guidance, it can all turn into a mess. So, follow these steps and at the end of the article, you will know how to replace the EGR valve on Ford Mustang (2000 – 2015).

1. Required tools for the job

  • Scanning tool (OBD2)
  • New EGR valve
  • 10-millimeter socket
  • Safety goggles and gloves

2. Diagnose a bad EGR valve

Before removing any part of the vehicle that you suspect has gone bad, it is best to actually diagnose it. To diagnose a bad EGR valve, you will need a scanning tool. There are a lot of scanning tools and some of them are pretty expensive. However, I have been using this scanning tool that I got from amazon.com for $55 and it does wonders.

In order to diagnose a faulty EGR valve, you will need to hook up the scanning tool to the vehicle’s computer. To do so, you will need to get under the steering wheel. There you will see an OBD 2 port. Connect the OBD 2 scanner and start it. Select scan vehicle and wait for a couple of minutes.

Error codes associated with a faulty EGR valve are:

  • P0400 Exhaust Gas Recirculation Flow Malfunction
  • P0401 Exhaust Gas Recirculation Flow Insufficient Detected
  • P0402 Exhaust Gas Recirculation Flow Excessive Detected
  • P0403 Exhaust Gas Recirculation Circuit Malfunction
  • P0404 Exhaust Gas Recirculation Circuit Range/Performance
  • P0405 Exhaust Gas Recirculation Sensor A Circuit Low
  • P0406 Exhaust Gas Recirculation Sensor A Circuit High
  • P0407 Exhaust Gas Recirculation Sensor B Circuit Low
  • P0408 Exhaust Gas Recirculation Sensor B Circuit High
  • P0409 Exhaust Gas Recirculation Sensor A Circuit
  • P0486 Exhaust Gas Recirculation Sensor B Circuit
  • P0487 Exhaust Gas Recirculation Throttle Position Control Circuit
  • P0488 Exhaust Gas Recirculation Throttle Position Control Range/Performance
  • P0489 Exhaust Gas Recirculation Control Circuit Low
  • P0490 Exhaust Gas Recirculation Control Circuit Low

If you get any of the above codes, especially P0400, P0401, and P0402, it means that the EGR valve is faulty and needs replacing.

3. Locate the EGR valve

On the 2000 to 2015 Ford Mustang vehicles, the EGR valve is located on the front center of the engine, right next to the oil cap. The EGR valve has a round shape and it has either a vacuum hose or an electrical cord on top of it. The older Ford Mustangs have a vacuum line, whereas the newer models have electrical connectors on the EGR valve.

If you are not sure where the EGR valve is located on your Ford Mustang, you can always check the owner’s manual. It will tell you the exact location of the EGR valve.

4. Disconnect and remove the faulty EGR valve

Like I said before, the EGR valve can either be run by a vacuum line or an electrical power. In order to remove the faulty EGR valve, you will need to disconnect the line that powers it. So, remove the vacuum line or the electrical connector and get it out of the way. Just make sure it doesn’t get in contact with some oil or water.

Then, grab a 10-millimeter socket and remove the bolts on the EGR valve. There are usually two to three bolts that hold the EGR valve in place. Remove them carefully and store the bolts for later. If you are using a socket with an extension, you might need to remove the oil cap to gain more access.

5. Install the new EGR valve

The new EGR valve for your Ford Mustang might come with new screws. If that is the case, then use the new screws. However, if not, you can always use the old screws (if they are not broken or damaged). So, first, insert the screws and then attach the EGR valve onto the engine. Tighten the new EGR valve using a 10-millimeter socket. Then, reconnect the electrical cord/vacuum lines. Make sure they are connected properly.

6. Start your vehicle and scan it with a scanning tool

After you successfully have installed the new EGR valve, there shouldn’t be any issues with your vehicle anymore. However, the error codes can still be found. Depending on which tool you have, you can scan your vehicle and delete the error codes. Then, drive the vehicle for about 100 miles and see if the code comes back.

How Much Does It Cost To Get EGR Valve Cleaned

Getting your EGR valve cleaned, can cost you around $10 (to buy a carb cleaner) if you do it or around $100 if you take your vehicle to the repair shop. I would suggest you try to clean your EGR valve first as it might solve the issue. Here is how to clean your EGR valve without removing it. If this doesn’t solve the problem, then you can take your vehicle to the mechanic shop.

Car Care Hacks

Hi there. I am a certified Automotive Service Excellence (ASE) mechanic since 2018 and a car detailer for 10 years.

Recent Content