Symptoms of a Bad or Failing EGR Control Solenoid

Schedule Exhaust and Emission System Inspection
Service Area

$0.00

Upfront, Transparent Price
Average rating from 129,829 customers who received a Exhaust and Emission System Inspection.

The exhaust gas recirculation system, also known as the EGR system, is an emission system that is found on many road going cars and trucks. Its purpose is to recirculate exhaust gases that have exited the engine, back into the intake manifold so that they can be reburned. This dilutes the amount of oxygen coming into the engine by replacing some of it with inert gases, which reduces the NOx levels, and temperature of the mixture.

The EGR system is controlled by the EGR control solenoid. When the EGR control solenoid is activated, a passage is opened up that allows exhaust gases into the intake manifold. The EGR solenoid is controlled by the engine computer, and activated at very specific times in order to achieve the best performance, efficiency, and emissions from the engine.

The EGR solenoid is one of the main components of the EGR system, and any problems with it can cause the system to not function, which can be a major problem in states with strict emissions regulations. Usually a problem with the EGR control solenoid will produce a few symptoms that can alert the driver of a potential problem that should be serviced.

1. Engine performance issues

One of the first symptoms of a possible problem with the EGR control solenoid is engine performance issues. If the EGR solenoid has any issues, it can cause the finely tuned air fuel ratio to be thrown off. This may result in a decreased power, acceleration, fuel economy, as well as an increase in emissions.

2. Engine pings or knocks

Another symptom of a potential problem with the EGR control solenoid is engine ping or knock. If the EGR solenoid fails it can disable the EGR system from recirculating exhaust gases. For certain engines this can cause a large increase in cylinder and exhaust gas temperatures. Excessively high cylinder temperatures can cause engine ping and knock, which can lead to serious engine damage if left unattended.

3. Check Engine Light comes on

An illuminated Check Engine Light is another symptom of a bad or failing EGR control solenoid. If the computer detects an issue with the EGR solenoid, circuit, or system, it will set off the Check Engine Light to notify the driver of the issue. A bad EGR solenoid can cause a variety of different trouble codes, so having the computer scanned for trouble codes is highly recommended.

The EGR control solenoid is one of the most important components of the EGR system. Without it the EGR system will not be able to recirculate the exhaust gases properly, which can lead to issues with engine performance and even emissions. For this reason, if you suspect that your EGR control solenoid may be having an issue, have the vehicle inspected by a professional technician, such as one from YourMechanic, to determine if the solenoid should be replaced.


Next Step

Schedule Exhaust and Emission System Inspection

The most popular service booked by readers of this article is Exhaust and Emission System Inspection. Yourmechanic’s technicians bring the dealership to you by performing this job at your home or office 7 days a week between 7AM-9PM. We currently cover over 10k cities and have 100k+ 5-star reviews... LEARN MORE

SEE PRICING & SCHEDULING

The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Recent Exhaust and Emission System Inspection reviews

Excellent Rating


YourMechanic Exhaust and Emission System Inspection Service

Average Rating

4.9/5

Number of Reviews

129,829

Rating Summary
121,202
4,801
964
664
2,198
121,202
4,801
964
664
2,198

Grzegorz

40 years of experience
473 reviews
Grzegorz
40 years of experience
Nissan Sentra - Car is not starting - San Carlos, California
Grzergorz has performed several services on our Nissan. Punctual, efficient, professional and courteous; you cannot ask for more. Highly recommended.
Jeep Commander - Thermostat - San Francisco, California
Have now used Grzegorz for three of my vehicles. He's knowledgeable, fast, does excellent work, and is a great guy. All mechanics should be like him.

John

35 years of experience
318 reviews
John
35 years of experience
Nissan Sentra - Battery - Atherton, California
John was able to identify the real problem with the car - not the one suspected by a AAA mechanic with little knowledge. He took extra time to go drive to pick up a battery after he arrived. Much appreciated!
Toyota Prius - Oil Change - San Francisco, California
Great job done by John. Arrived on time, super friendly and professional. It's my first time using the service, so a nice positive introduction. Couldn't have gone better. Thanks, John!

MICHAEL

32 years of experience
137 reviews
MICHAEL
32 years of experience
Mercury Mountaineer - Exhaust and Emission System - Philadelphia, Pennsylvania
Did everything he could to track down a emissions code, after all recommended to replace a bad PCM.

Caster

27 years of experience
176 reviews
Caster
27 years of experience
Toyota Sienna - warranty inspection - Santa Rosa, California

Need Help With Your Car?

Our certified mobile mechanics make house calls in over 2,000 U.S. cities. Fast, free online quotes for your car repair.

GET A QUOTE