Skip the auto shop - Our mechanics make house calls

Q: Evap vent valve has oil coming from it.

asked by on

There is liquid that smells like oil rather than fuel on the evap vent valve. I don't know how or where it's coming from. Please help I just got this truck.

My car has 211735 miles.
My car has an automatic transmission.

Is the check engine light on for a problem with the evap system vent valve? The fuel tank may have been overfilled. The evap canister has charcoal inside and if the fuel was overfilled it may be coming out of the vent after passing through the charcoal canister. In this case, it would be best to replace the valve and canister together. Consider hiring an experienced technician like one from YourMechanic who can come out and check the function of the evap vent valve and system to offer a more personal diagnosis.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: Average 10.5 mpg

It is best to abide by the recommendations stated in the owners manual. Turning off traction control may allow more stress to be put on the vehicle and cause accelerated wear in some areas. The traction control is not directly...

Q: Vehicle hard to start

The carburetor on your van may have gotten sediment from the fuel system into it, which causes the jets to get clogged. I recommend having the fuel pump checked to see if it is working properly and sending the right...

Q: Car is spluttering similar feeling when your car runs out of gas. Engine light is on

If the O2 sensor is going bad, this can definitely cause the symptoms you are describing. As you may know the oxygen sensors which are part of your emissions system read exhaust gases to determine whether or not the appropriate...

Related articles

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...
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.