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Honda Civic Gas Tank Won’t Open/Close/Noise/Leak

Honda Civic Gas Tank Won’t Open Close Noise Leak

As any Honda Civic owner will tell you, gas tank problems are common. Fortunately, though, the Honda Civic was built with gas security in mind. However, we’ve got some excellent solutions for you, so you’ll never be stuck with no access to your gas tank again.

Honda Civic fuel filler caps won’t open or close if the car is locked, you have a defective fuel door, the key battery is dead, or the vehicle is locked before accessing the fuel door. Gas tank noise is normal if it’s the two-valve making the noise. Deal with gas leaks by calling a mechanic.

The following article will explain why your Honda Civic gas tank won’t open, why it won’t close, and why there is noise or leaks. We will also show you how to fix all these issues, so you can drive safely in the knowledge that your gas tank is secure.

Honda Civic Gas Tank Won’t Open

Honda Civic Gas Tank Won’t Open

You’re desperately in need of gas, you’ve finally gotten to the front of the queue, and now the fuel filler cap won’t open. It’s every driver’s nightmare, but we’ve got the solutions. See below for some simple fixes to your Honda Civic fuel door issues. No more gas station stress for you!

Cause: A Locked Car

One reason your Honda Civic fuel cap won’t open is that the car is locked. Not all models have the locking capability, but it’s worth checking if yours does. Some car keys automatically lock the vehicle when you step away from the car, and others will lock the fuel cap when you lock the car.

Solution: Unlock the Car

Unlocking your car might solve your problem, and you might also need to find out what distance from your car the keys need to be at to unlock the filler cap. It’s useful to read through your manual or speak to a car locksmith about your key. Suppose you’ve lost your manual, search online, as many companies offer free downloads of their manuals. You can also ask on community forums or in Facebook groups if anyone has the same make.

Cause: Faulty or Defective Fuel Door

Sometimes, the fuel filler door is broken, faulty, or wedged shut for various reasons. It could be blocked by dirt, warped by heat or an accident, or sticky from fresh paint. Not every Honda Civic comes off the production line as a perfect specimen, and faulty fuel filler caps are not uncommon.

Solution: Secret Manual Release Lever

Pop your trunk, and have a look at the ceiling on the driver’s side of the car. There should be a cable, usually green in color, but this may differ. If you pull the cable, it will unlock the fuel filler cap’s locking mechanism, even without any power to your vehicle. The secret manual release cable is the ideal fix if you’re broken down or got stranded with a dead key battery.

Watch Northern Viking Everyday video on the Honda Civic release cable here:

Honda Civic Gas Tank Won’t Close

Honda Civic Gas Tank Won’t Close

We’ve all been there — stuck in the gas station with a fuel door that won’t close. It’s incredibly annoying when you’re late for work, or the kids are with you. Some simple things cause a Honda Civic fuel door to get stuck, and they all have easy solutions. See below for some quick fixes for getting your Honda Civic fuel door to close.

Cause: Locking the Car Before the Fuel Cap Is Closed

A leading cause of Honda Civic fuel caps, not closing, is that it has been locked with it open. When you’re filling up on gas, it’s easy to forget to close the fuel door while you head into the store to pay. As you lock your car behind you, you’re leaving the fuel filler cap stuck open.

Copyright protected article by Know My Auto and was first published on Jan 31, 2021. .

Solution: Remember To Close the Fuel Cap Before Locking Your Vehicle

Another easy solution, although perhaps easier said than done! Try to remember to close your fuel door before locking the car so that the locking mechanism can seal the fuel door.

It might help to write a note on your hand, to remind you. You can even add a tag to your key with a note. For that, we recommend Uniclife’s Rainbow Key Tags with labels from They’re super handy, and you can use them for all kinds of things, such as kids’ lunchboxes, petty cash tins, or luggage.

Cause: Battery Is Dead

Since Honda Civics rely on the locking mechanism to close the fuel filler cap, your car key battery may be the problem. If your battery is dead or running low, or even if there’s a little bit of dust somewhere there shouldn’t be, it might make closing your fuel filler cap difficult. Keep an eye on your battery, as you don’t want to be stuck with a wedged open fuel door.

Solution: Recharge or Replace the Battery

Luckily, this problem has a super easy fix. You’ll need to recharge or replace your battery. Give it a clean while you’re at it, just in case of dust or fluff. If you need cell batteries, we recommend these Duracell Lithium Batteries. One packet contains one battery, so there’ll be no spare batteries lying around the house.

Honda Civic Gas Tank Noise

Honda Civic Gas Tank Noise

Many Honda Civic owners come across a humming or moaning sound from their gas tank. Fortunately, this is nothing to worry about and is relatively standard. However, some drivers like to half-fill their fuel tank, as they find this stops the noise.

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When you hear the gas tank noise, lift the hood, and unscrew the fuel filler cap. If the noise stops, then the cause of the noise is the two-valve acting typically, and there’s nothing to worry about. If the noise doesn’t stop, it could mean something else is not working correctly, and you should take your car to a mechanic.


If the two-valve is the problem, there’s nothing you need to do, as the sound you can hear is simply the regular running sound of your car. However, if you’re in doubt, take your Honda Civic to a mechanic to get the issue investigated. They may be able to help fix or minimize the sound or at least reassure you that there is nothing wrong with your vehicle.

Honda Civic Gas Tank Leak

Honda Civic Gas Tank Leak

Most drivers have to deal with a gas leak sooner or later, but don’t worry if it happens to your Honda Civic. Remember your safety if there is fuel leaking, don’t smoke or use your phone around spilled gasoline. If you get gasoline on your skin, rinse it off immediately, and seek medical assistance. Never drive a vehicle with a fuel leak.


Several things cause fuel leaks in Honda Civics, including:

  • Fuel tank rots or fails
  • Fuel filters need replacing
  • A hole in the fuel tank

Anything mechanical will rot or age over time, and the parts of your car are no different. You may not have owned the car for long, but if you bought it second-hand, it would have been around a long time. Knowing your car’s age is essential, and it’s useful to obtain a log of any work done by previous owners, such as repairing or replacing the fuel tank or fuel filters.


Usually, you’ll need to call a mechanic for fuel leaks. Don’t attempt to drive to the garage; find a mechanic who will come out to you. They may need to replace smaller parts, like filters, or even significant parts, like the tank itself. If you notice a fuel leak on the road, pull over somewhere safe, and call a mechanic or breakdown recovery.

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KnowMyAuto is the sole owner of this article was published on Jan 31, 2021 and last updated on .

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