Showing articles & questions for topic
Gas Cap

Related articles

How to Troubleshoot a Gas Cap Cover That Won't Open
Gas cap covers, or fuel doors, get stuck closed and won't open if there's a faulty internal spring or lever, lack of lubrication, or bent fuel door.
How to Troubleshoot a Gas Cap That Won't Click
Gas caps click when they are secure. A damaged gas cap may be caused by a damaged gasket, gas tank filler housing, or debris in the fuel neck.
How to Troubleshoot a Gas Cap That Won't Come Off
Gas caps stick and won't come off when the gas cap is broken, there's a mechanical defect in the gas tank filler neck, or gas cap is locked.
Symptoms of a Bad or Failing Fuel Filler Cap
Common signs include the cap not tightening properly, a fuel smell in the car, and the Check Engine Light coming on.
Symptoms of a Bad or Failing Gas Cap
Common signs include the cap not tightening properly, a fuel smell in the car, and the Check Engine Light coming on.
How Long Does a Gas Cap Last?
The fuel that resides in your gas tank is used to power your vehicle and to supply the material needed for the combustion process. Making sure that the gas in the tank...
How to Replace a Fuel Filler Cap
A good fuel filler cap safely seals the fuel tank. Signs of a failing fuel cap include the smell of gas, stripped threads, or a cracked cap.
Can a Loose Gas Cap Let Gas Leak Out of the Fuel Tank?
The short answer is: yes ... kind of. What escapes out of a loose or faulty gas cap is gas vapor. Gas vapor rises off of the pool of gasoline in the...
How To Install a Locking Gas Cap
Gas caps are necessary for proper gas tank function. Overtime, a gas cap can fail if the thread gets damaged or if there is a leak in the seal.
Is It Safe to Drive With the Gas Cap Light On?
You have what sometimes seems like innumerable warning lights in your vehicle. Some of them alert...

Related questions

Question
Bike switches off while driving
Depending on the type of fuel valve you have you should remove the fuel valve from the fuel tank to clean or replace the tank filter screen mounted on the fuel control valve. The filter is most likely clogged with...
Question
Does Ford escape has fuel cap?
If you open the gas door and do not see a gas cap then look for a sign that say easy fill no gas cap required. If you see this then your vehicle is not equipped with a gas cap....
Question
Gas cap loose and check engine soon light comes on
Hi. In some cases I have seen that after market gas caps do fix the engine light for the gas cap. I suggest you try getting a gas cap from the Buick dealership and have the engine light reset properly....
Question
My check fuel fill inlet keeps popping up and I don't have a gas cap
Hi there. The fact you're missing the gas cap is most likely what's causing the check fuel fill inlet to keep popping up. Believe it or not, the fuel cell is a highly balanced containment system that requires to maintain...
Question
Emissions test failed with a new gas cap
Hey there. This may be related to other possible malfunctions in your EVAP system, such as a faulty vent valve solenoid. The EVAP system prevents fuel vapors from the fuel tank from escaping into the atmosphere. The EVAP system collects...
Question
Fuel tether turns with gas cap, causing the gas door (flap) to close.
Hello there, a few common faults will cause your 2004 Hyundai Sonata to have issues removing the gas cap. In cold weather the gas cap seal can become stuck, this will allow the gas cap to turn but not fully...
Question
How do I fix the issues related to code P0445 (Failed Emissions Test)?
Diagnostic Trouble Code P0455 has causes in addition to a faulty or loose gas cap. In your circumstance, the first thing you should do is reset the Check Engine Light which will erase the existing codes. Then see if the...
Question
Gas tank implodes/ won't fill.
Your fuel tank is going into a vacuum when the engine is running. The vacuum condition is causing the fuel tank to collapse and the gas cap is supposed to let in fresh air from the outside to keep the...
Question
Gas cap notification and check engine light came on after getting gas. Car started to sputter and stall out.
Hi there. When the fuel cap is not securely fastened to the tank, it can create vacuum issues inside the tank; which triggers the error code to be stored in the ECU. The error will then trigger the check engine...
Question
Will the Check Engine Light turn off by itself or do I need to manually turn it off after I fix the problem?
The computer will run self tests as the vehicle is turned on, and while the vehicle is driving. There are certain circumstances for each test that must be met for the computer to turn off the check engine light. The...
Question
Gas Cap
The first to do is to look at the gas refueling location to see if you have the no cap design or the cap is just missing. If you have the no cap design then you do not have to...
Question
I just had the fuel fill inlet replace and the gas door light came on again. Seems like the light comes on from driving in rain or going through a car wash. What is happening?
Hi there. If water is getting into the fuel door and flooding the gas cap area, first check the gas cap for a good seal. The cap should seal the fuel and vapors in and not leak out. If the...
Question
Gas cap light comes on but i got a new cap and it still comes on, what's wrong. 2007 Chrysler
Hi there - on some cars, a correction for this warning requires multiple "drive sessions" to reset this code. It may also be possible, using a Check Engine code scanner/reset tool, to reset this code. If the code does not...
Question
The gas cap on my car broke off. (The black knob you use to screw in the gas cap.) The gas cap is stuck securely in the fuel neck. How can I remove it?
Hi there. To remove the gas cap that broke off, get a pair of needle nose pliers and use it to remove the gas cap. Try to locate a part of the gas cap that you can grab with the...
Question
Truck goes into reduced power. I have to stop, remove the key from ignition, remove gas cap, and put the gas cap back on. Truck some times will do this 2 to 4 times.
Hi there. Check the gas cap seal and see if there is a crack on it or if there is a distortion on the seal. If there is, I recommend replacing the gas cap. The gas cap seal is designed...
Question
Above you give information for correction on the fuel cap, but where is the "next" button?
Hi there. The message is on for the fuel system is not able to build up pressure. Check the fuel cap seal and see if the seal is cracked or broken. A broken seal on the fuel cap will cause...
Question
The CHECK FUEL FILL INLET message came on while I was driving down the highway and had not fueled in several days.
Try removing the gas cap and putting it back on. While the gas cap is off, check the seal on the cap and see if there is any cracks or damage to the seal. If the seal is good and...
Question
My gas cap light keeps coming on. It won't click when I turn it, so I bought a new cap. New cap won't click closed either. What co
If you need a gas cap, especially if you are trying to resolve what you believe might be a cap related fault, use an OEM (dealer supplied) cap. Using a genuine OEM cap of the design supplied when the car...
Question
My car shows the check engine light, the computer showed code P0455, and it shakes and vibrates at stops and during acceleration.
First, remove and reinstall the gas cap, clear the code P0455, and drive the vehicle for a few days and see if the code comes back. If the code comes back on, then either the gas cap needs replaced...
Question
2014 Ford c max hybrid
The “check fuel fill inlet” warning light means that there is a problem with the fuel tank fill seal. The seal could be missing, loose, damaged, distorted, or there is debris in the fuel fill inlet, and/or there is a...

Need a mechanic?

Our certified mobile mechanics make house calls in over 700 U.S. cities. Fast, free online quotes for your car repair.

Get a quote

Post a question and get free advice from our certified mechanics.


Ask a question