Skip the auto shop - Our mechanics make house calls

Q: Problem with filling tank. Code says bad evap canister/valve and/or gas cap

asked by on

I can't fill the tank. When I'm at the pump it wont let me pump more than a few squirts at a time, sometimes. Mechanic did smoke test and some diagnostics and found there's no leak, but that it's likely the charcoal canister/valve and maybe need a new gas cap. I can't ever get these guys to contact me back, so I'm asking here. I'm not sure if I need a new canister, or just the valve and lines, or both.

My car has 166400 miles.
My car has an automatic transmission.

Hi there. More often than not, the issues filling up the fuel tank is attributed to a bad EVAP vent solenoid. It is the job of the EVAP vent solenoid to allow air into the charcoal canister so that the EVAP system can pressurize and function properly. When the solenoid is opened, air is allowed into the EVAP system to relieve any pressure that may be present as a result of purging the EVAP system. However, it could be other parts of the EVAP system, so you should have a professional mechanic inspect your vehicle first to know for sure what’s causing your fuel tank issues.

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!
  • Home
  • Questions
  • Problem with filling tank. Code says bad evap canister/valve and/or gas cap

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: Getting fumes and smell while idling and driving

Hello there, many common faults will cause your 2003 Audi A4 to have fumes and a smell when idling. Generally any EVAP or gasoline vapor leaks will trigger a check engine light with an EVAP leak code. In some cases...

Q: How do I turn off the StabiliTrak?

The traction control system (TCS) and StabiliTrak system are crucial parts of your vehicle’s safety. TCS and StabiliTrak limit wheel spin, and keep your vehicle driving securely and safely, especially in adverse weather conditions. However, you can turn off the...

Q: Clanging coming from the driver front - motor mounts? 2009 Chevy Cobalt

Hi there - there are 3 {motor/transmission mounts](https://www.yourmechanic.com/article/symptoms-of-a-bad-or-failing-engine-mount) for the engine and transmission - which mounted as a single unit. The rattling noise could be a number of things depending on when the car is making the noise - while...

Related articles

How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
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...
What are the Car Pool Rules in Hawaii?
Hawaii is widely regarded as a land of vacation and relaxation, and as such, its scenic roads and routes are far better known than the state’s freeways. But, as with all...