Skip the auto shop - Our mechanics make house calls

Symptoms of a Bad or Failing EVP Shut Off Solenoid

evp shutoff solenoid

Bad or Failing EVP Shut Off Solenoid Inspection

by a top-rated mechanic at your home or office

Many modern engines are equipped with EGR systems to help lower vehicle emissions. The EGR system’s purpose is to recirculate exhaust gas back into the engine so that they can be reburned, reducing cylinder temperatures and NOx emissions. The EGR system uses a combination of sensors and solenoids to control the flow of the exhaust gases for maximum engine efficiency.

One of these solenoids is the EVP shut off solenoid. The EVP shut off solenoid is one of the main components used to control the flow of the EGR system. The computer continuously monitors the pressure and temperature of the EGR system and will activate the EVP shut off solenoid when the correct conditions are met. When the EVP shut off solenoid fails, the EGR system can remain open and flowing, even when it is not desirable for it to do so. Usually a bad or failing EVP shut off solenoid will produce a few symptoms that will alert the driver of a potential problem that should be serviced.

HAVE SYMPTOMS OF CAR TROUBLE?
Get an $80 diagnostic
by a top-rated mechanic at your home or office.

Get a quote · Book an Appointment · Our expert mechanics come to you.

1. Poor cold start performance

One of the first symptoms of a problem with the EVP shut off solenoid is poor cold start performance. If the EVP solenoid fails the EGR valve can remain permanently opened. This can cause the vehicle to experience rough idle and even hard starting, especially during cold starts.

2. Check Engine Light comes on

Another symptom of a bad or failing EVP shut off solenoid is an illuminated Check Engine Light. If the computer detects a problem with the EVP shut off solenoid circuit it will set off the Check Engine Light to alert the driver of an issue. The Check Engine Light can also be activated by a wide variety of other issues so having the vehicle scanned for trouble codes is highly recommended.

HAVE SYMPTOMS OF CAR TROUBLE?
Get your car fixed at your home or office.

Get a quote · Book an Appointment · Our expert mechanics come to you.

3. Failed emissions test

Another symptom of a problem with the EVP shut off solenoid is a failed emissions test. The EVP shut off solenoid is a part EGR system, which is designed to reduce NOx emissions. A bad solenoid may compromise the functionality of the entire EGR system, which can cause the vehicle to fail an emissions test due to excessive NOx emissions. For states with strict emissions regulations, this may render the vehicle legally undriveable until the problem is fixed.

The EVP shut off solenoid is an important component in maintaining the proper functionality of the EGR system. Any problems with it can compromise the effectiveness of the EGR system and cause excessive NOx emissions. For this reason, if you suspect that your EVP shut off solenoid may be having an issue, have the vehicle inspected by a professional technician, such as one from YourMechanic, to determine if the component 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

How Long Does a Fuel Filler Neck Last?
Getting gas from the pump to your gas tank is the only way to keep a car going. The fuel filler neck is a metal tube that is welded to the...
P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...
How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...


Related questions

Q: My son bought an S10. It drove for a week. It was good until I changed oil and heard a knock!

Hi there. I hate to be the bearer of bad news, I but I think you will need to pull the engine out, disassemble it, and check clearances precisely to determine the source. Given your mileage, and the "sludge" condition...

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: My engine is knocking very loudly and I have a cracked radiator and an oil leak . I have a quote for 920 to repair everything is t

From what you've described, I have a feeling that you may need a lot more work done than your quote of $920 to fix this vehicle. Be aware that an engine knock can be an internal engine problem requiring an...