What are the symptoms of a failing EGR valve?

2 minutesread

Symptoms of a failing EGR valve:

A faulty EGR valve can cause problems with the flow and operation of the EGR system resulting in performance issues including a shortage of power, reduced acceleration, and decreased fuel efficiency. It can even cause vehicle emissions to extend.

EGR valves can become stuck ‘open’ or ‘closed’ because of a build-up of soot particles, carbon deposits, and dirt from fuel. Motorway driving conditions are the foremost favorable to your EGR valve as longer, faster journeys allow the engine to get hot enough to get eliminate carbon deposits. Whereas urban driving conditions can allow these deposits to create up.

EGR valve symptoms can vary, however, the foremost common symptoms of a faulty EGR valve are explored below:


Rough Engin Idle:

A rough idle when starting your vehicle or during brief stops (i.e. low engine speeds with a warmed-up engine) will be caused when the EGR is continually open and an eternal flow of exhaust gases go into the manifold.


Poor Car Performance:

Poor performance is caused when the valve is open or closed. The wrong function of the EGR valve can cause the erratic performance of your vehicle.


Increased Fuel Consumption:

Increased fuel consumption is caused when the valve is consistently open. This is often because the temperature is lower so fuel doesn’t burn at the optimal temperature and as a result’s less efficient.


Frequent Stalls:

Stalling when the engine idles sort of a rough idle is sometimes caused when the EGR valve is permanently open and is continually letting exhaust gases into the EGR system.


Fuel Smell:

You can usually smell fuel if there’s a never-ending flow of exhaust gases into the manifold, because at low revs, not all the fuel burns. This implies the number of hydrocarbon gases emitted from the tailpipe increases significantly producing a fuel smell.


Engine Management Light Stays ON:

Your engine management light may remain once your car detects a difficulty with the EGR valve. This might be caused when the EGR is either constantly closed or open. However, it’s worth noting that sometimes the EGR valve starts to degrade before it fails, and also the engine management system might not obtain that until it fails. Therefore it’s worthwhile searching for the opposite signs and symptoms mentioned.


More Emissions:

When your EGR valve isn’t working correctly more emissions are going to be emitted. As aforementioned if the valve is stuck open the temperature is lowered which prevents all the fuel from burning. This suggests an increased flow of unburned hydrocarbon gases starting up of the tailpipe.

While if your valve is often closed the high temperatures in the combustion chamber allow the excessive formation of NOx gases.

A to Z All Answers About Japan Used Cars

Technical FAQ's

Read and learn about car Technical FAQ and get in-depth details of the car features.


Japan Auto Auction

Check out the details and procedure to buy used cars from Japan auto auction.


Japan Used Car Inspection

Read and get instant knowledge about the procedures of Japan used car Inspection.


Overseas Freight

Check out Overseas Freight Rates and Charges Details to import Japan used cars in your country.


Import Documentation

Read about the procedure & documents required while importing used vehicles from Japan.



Check out and read how is shipping done and how a car is being shipped from one country to another country.



Avoid fraud & scams and make a secure payment to import used cars from Japan to anywhere across the globe.


General FAQ's

Read and get the basic knowledge about car maintenance, and in-depth details of cars.


Import Regulations

Check out the rules & regulations in all countries to import Japan used cars.


Japan Used Cars

Check out the details of the best Japan used cars and how to buy them.


Previous Post
Next Post

Related Knowledge Base Posts

Leave a Reply

Your email address will not be published. Required fields are marked *

Want to Buy Used Cars from Japan?

More than 70,000 Japanese Used Cars available on sale from trusted Japan Car Exporters

What Is Jct Images


JapaneseCarTrade.com (JCT) the most trusted & free Japan used vehicle portal that connects overseas buyers to Japan used vehicle exporters since 2005.
JCT does not charge any commission, transaction fee or any hidden cost from buyer or exporter. All deals are directly between buyers & exporters that is saves your hard earned money from 10% ~ 50% of car cost.

JCT is associated with JUMVEA (Japan Used Motor Vehicles Exporters Association), SAFE TRADE (JUMVEA Safe Trade for 100% Money Back Guarantee), SLAAJ (Sri Lanka Automobile Exporters Association in Japan) & SLBCJ (Sri Lanka Business Council of Japan) to connect established, trusted & reliable exporters for safe & secured business from Japan.

Welcome to Our Website