Skip the auto shop - Our mechanics make house calls
  1. Home
  2. Articles
  3. Symptoms of a Bad or Failing EGR Control Solenoid

Symptoms of a Bad or Failing EGR Control Solenoid

EGR control solenoid

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.

The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
Still not sure about your car's issue?
Diagnose your car
What kind of issue are you experiencing?
Brakes are squeaking
Car is not starting
Car is overheating
Car is shaking (vibrating)
Fluids are leaking
Heating and A/C
Smoke or steam is coming out of the car
Warning light is on
Icon-warranty_badge-02

Skip the repair shop, our top-rated mechanics come to you.

At your home or office

Choose from 600+ repair, maintenance & diagnostic services. Our top-rated mechanics bring all parts & tools to your location.

Fair & transparent pricing

See labor & parts costs upfront, so you can book with confidence.

12-month, 12,000-mile warranty

Our services are backed by a 12-month, 12,000-mile warranty for your peace of mind.

Get A Quote

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

More related articles

P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the...
Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...
P2159 OBD-II Trouble Code: Vehicle Speed Sensor B Range/Performance
Diagnostic Trouble Code (DTC): P2159 P2159 code definition Vehicle Speed Sensor B Range/Performance...


Related questions

Q: Car would self stall even in neutral

The fault codes should be read out to determine the exact nature of the fault. I believe the mechanic you consulted was talking about the camshaft timing solenoid. While this could cause a stalling to occur when coming to a...

Q: P0750 code displayed

Hello. Once you have the pan off you can trace the blue wire with the green stripe to the correct solenoid. If you need help having the correct one repaired, an expert from YourMechanic can come to your location to...

Q: EGR BPT valve & EGR solenoid valve need replacements

Hello there. When codes go away like this, it generally means that the fault has resolved itself or the Check Engine Light has failed in the cluster. If the code is gone this would indicate that there is not a...