Gas tank access door not opening

The lock on the gas tank access door does not disengage and we are unable to get to the gas cap to refill the car.
Experienced mechanics share their insights in answering this question :
A visual inspection of the problem will help us determine the cause of your issue. You likely have a damaged cable which runs to the door, or even perhaps a broken piece of plastic in the system. A qualified technician, such as one from YourMechanic can assist you in diagnosis and repair.

How to Identify and Fix Common car Problems ?

Our sources include academic articles, blog posts, and personal essays from experienced mechanics :

Causes of a jammed/stuck fuel door:

Damaged release cable – In most vehicles, a cable runs from your fuel door lever to the fuel cap door. If this cable snaps or becomes loose, there will be no connection and the fuel door will not open. It will need to be replaced in order to open your fuel door.

Many cars have a fuel release lever that you have to engage in order to unlock the gas tank door. If your car has one, it will be near the bottom of the driver`s seat, close to the driver`s side door. Look for a small lever with a gas pump on it, then pull the lever up to engage it.
Air locks are caused by air leaking into the fuel delivery line or entering from the tank; common causes include the fuel tank being allowed to run dry, changing a fuel filter, or leaky fuel lines. Air locks are eliminated by turning the engine over for a time using the starter motor, or by bleeding the fuel system.
Mercedes-Benz cars have no fuel levers inside the vehicle for opening the fuel cap, which can make learning how to open it a little frustrating.
Go around to the rear passenger side of the vehicle. Push firmly on the left-hand side of the fuel filler door and it will pop open!
Just like any component on your vehicle, the springs and release mechanism that operates the fuel door can become worn and need replacing over time. When the time comes to replace your gas door, AutoZone has every product you need to get the job done right.
Normally, air flows through that tube while you`re filling and the gas keeps flowing as long as you hold down on the trigger. When that hole gets covered by gasoline (when your tank is full), a vacuum forms inside the nozzle and an automatic shutoff switch gets tripped, turning off the flow of gas with a thunk.
Gas pump nozzles are designed with a device on the end that turn off the fuel flow when the gasoline runs back into it. This is a safety mechanism which prevents the gas from coming out and spilling when filling up the tank. Typically, this indicates that the tank is full.
A symptom known as “airlock” occurs when this flow is interrupted by an air bubble, causing the engine to shut down and refuse to start. By bleeding trapped air from the fuel system, you can restore the flow of fuel and get your marine diesel engine running again.
A symptom known as “airlock” occurs when this flow is interrupted by an air bubble, causing the engine to shut down and refuse to start. By bleeding trapped air from the fuel system, you can restore the flow of fuel and get your marine diesel engine running again.

Relevant Questions and Answers :

the most relevant questions and answers related to your specific issue

Dome lights will not turn on when door opened, radio will not turn off when car is off and door is opened.
ANSWER : Hello, thank you for writing in. The vehicle is likely having issues with the door switch which activates/shuts down both circuits. This is going to look like a peg in the door frame next to the hinge. The peg that is designed to make contact with the switch behind it may be at fault, or the switch itself may be faulty. It is best considering the circumstances that you replace the entire unit, as they are typically sold as an assembly. It is a rather straight forward repair if you are looking to do it yourself. Simply remove the old switch and reconnect it to the new one. Make sure to unplug the battery before hand. With that said, you can also contact our service department to schedule an appointment, and we can resolve the issue for you.

When refilling gas tank, gas overflows before tank is full.
ANSWER : The most common cause of this type of problem is when the fuel filler neck’s inner tube comes off of the neck itself. You will need to have the filler neck removed to check to see if the inner tube was knocked off from someone trying to get fuel out of tank with a siphon hose and managed to knock the hose off. This causes the tank to not get filled properly and the inner hose can get caught in the fuel sender causing wrong readings.

If you’d like to get this fixed, consider YourMechanic, as a certified technician can help you service your fuel filler neck and ensure that your fuel gauge functions normally. Good luck.

Hi both of my doors of my 04 350z will not open from the outside but if window is open I can open from inside handle. Sounds elec
ANSWER : Hi there. It is possible that the problem with your doors is electrical, however, there are multiple individual components that make up the electric door locks, ranging from solenoids, to relays, fuses, control module and the door lock itself. Before receiving a price quote on what it would cost to fix it, it would first require an inspection to properly diagnose what is damaged and needs to be fixed. I would recommend having one of our professional mobile mechanics come to your location and complete a door will not open inspection first, so they can pinpoint the source of your issue and recommend the right repairs.

Drivers door won’t open with fob and no beep when door is opened, or when it is accidentally left open
ANSWER : The reason is the driver’s door lock actuator is not working properly and will need to be replaced before anything else is tested. I recommend having a mechanic, like one from YourMechanic, come and replace the door lock actuator and check the latch for you.

Is there anyway to open the gas tank for refueling if the fuel gas lever failed to work?
ANSWER : If you remove the inside trunk side trim cover to access the back side of the fuel door you will pull on the manual release and then door can be opened. There are a few (YouTube videos for this procedure.) [https://youtu.be/hRbBKSPW37Y]

The driver side door wont open even though its unlocked what part do I need to get to fix the problem?
ANSWER : The drivers door inside panel will need to come off to reconnect the latch handle control arm. Sometimes the plastic clips that hold the rod on break and rod fall off and jams the door shut. The latch rod can be released by using a locksmith kit and lifting up on loose rod. Have a locksmith get the door open then a mechanic like one from YourMechanic can remove the door panel to get to and fix the broken clip or handle.

The door latch mechanism seems to be broken and will not allow the door to open. How do I open the door to replace it?
ANSWER : Hi! You can access the lock mechanism by removing the inner door panel. This should allow you to open the door. This may be difficult to do! If you are looking for some extra help, a certified technician from YourMechanic can come to your location to scope out the door problem and follow through with any needed repairs.

Why doesn’t my door open from the outside?
ANSWER : To determine what exactly has failed, it will be necessary to remove the inner door panel and look to see what part(s) have actually failed. The most common failures, when an outer door handle quits working, is a broken door handle, a failed retaining clip for the actuator rod, or bent linkage. In any of the situations listed, it will be necessary to physically look at the handle assembly, from the inside, to diagnose the failure. If this is something you feel you could use a hand with, to diagnose or repair, consult a certified mechanic, like those available at YourMechanic.com.