Is it Safe to Drive With an EVAP Leak?

Schedule Check Engine Light is on Inspection
Service Area

$79.99 - $89.99

Price range for all vehicles
Average rating from 4,896 customers who received a Check Engine Light is on Inspection.

An EVAP leak is a fault in the evaporative emission control system (EVAP). The EVAP’s function is to keep gasoline fumes in the fuel tank from reaching the atmosphere. This keeps air pollution down and keeps the smell of fuel from reaching the inside of your vehicle.

Fuel vapors are emitted from vehicles any time there is gasoline in the tank. So if you have a leak, even if you are not driving the vehicle, those vapors are polluting the air 24 hours a day. Uncontrolled emissions like this account for about 20 percent of the pollution produced by vehicles. 3 symptoms that will let you know that there is an issue with the EVAP system:

  1. Check Engine Light Illuminates. The Check Engine Light turning on while driving can happen for many reasons, one being an EVAP leak. A slight fuel odor may also be noticed, but it does not happen in all vehicles. If your Check Engine Light does come on, and you just filled up your gas tank, check the gas cap to see if it's loose.

  2. Loose Gas Cap. The most common cause of an EVAP leak warning, or the Check Engine Light, is the gas cap not being closed properly. If the cap is not fully tightened or closed all the way, the Check Engine Light may come on. Before taking your vehicle to a mechanic, check your gas cap to make sure it is positioned on the filler correctly and closed tightly. It being open potentially leaves room for fuel to leak out of the car.

  3. Leak in the Fuel System. If the gas cap is on correctly, there may be a more serious issue, such as a leak in the fuel system. Other issues could be a faulty vent o-ring seal, defective leak detection pump, defective purge valve, or another small leak somewhere in the EVAP system.

While it is safe to drive with an EVAP leak, you should get the leak repaired right away. EVAP problems can be challenging and the mechanic will have to use advanced troubleshooting techniques to determine where the leak is, as well as how severe it is.


Next Step

Schedule Check Engine Light is on Inspection

The most popular service booked by readers of this article is Check Engine Light is on 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 Check Engine Light is on Inspection reviews

Excellent Rating


YourMechanic Check Engine Light is on Inspection Service

Average Rating

4.8/5

Number of Reviews

4,896

Rating Summary
4,509
187
48
28
124
4,509
187
48
28
124

Travis

11 years of experience
328 reviews
Travis
11 years of experience
Buick LeSabre - Check Engine Light is on - Saint Paul, Minnesota
Travis was fantastic to work with, very prompt, professional and patient. He took the time to explain the diagnostic and my options for repair
Saturn Vue - Check Engine Light is on - Saint Paul, Minnesota
Travis is knowledgeable, professional and give me information about my engine that helps me maintain it.

Stacy

22 years of experience
112 reviews
Stacy
22 years of experience
Chrysler 200 - Check Engine Light is on - Hampton, Georgia
Very knowledgeable and thorough did a complete inspection and explained everything. Thing’s that I didn’t think were contributing to issues it was having. Awesome mechanic I will continue to book him and his service thanks Stacy

Michael

16 years of experience
2 reviews
Michael
16 years of experience
Mazda 626 - Check Engine Light is on Inspection - Washington, District of Columbia
I did not ask for another quote or another merchanic.ive been trying to get intouch with mr micheal since ill first visit.he told me that there is a problem with the company hes been trying to find out if the parts formy cars price is included in the $460 i want him to fix my car because he. knows whats wrong.he said as soon as he gets an answer from the company he would contact me ive left him numberic message .i deeply wants mr mucheal to fix my car thank you

Victor

9 years of experience
205 reviews
Victor
9 years of experience
Ford Escape - Check Engine Light is on - Virginia Beach, Virginia
Victor is awesome. He is very informative and honest. He took the time to properly diagnose the issue through testing multiple items on the car. What I requested to be replaced what not the actual problem. Great mechanic and I would recommend him for any service. I plan on using him for future services.

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