Fuel fill door wont open on my 2015 Honda Accord LX sedan

SOURCE: I have a 1994 Honda

the speed sensor relay is located on the gearbox so maybe is the fuel pump relay ,worth a look.

SOURCE: Exterior rear door handle on Honda Accord 2001

To Remove Door Panel on 2001 Honda Accord:

A: To remove the plastic piece with the door lock button and door handle connected to it:

1- Remove the screw in the middle located behind a plastic cover button
2- Push (slide) the whole assembly Forward (toward front of car)
Besides the screw, it is held in place by 3 hooks on the backside that hook into holes in the metal door frame
3- Now unhook handle from small metal bar going through door by pushing (toward door) plastic clip (blue?) off of the bar, then the bar will come out of the clip hole, thus releasing the handle.
4- Depress little grey button /bar (purple painted on it)on elec. connector to seperate connector, thus releasing door lock switch

Now the whole assembly (metal handle, door lock switch, and plastic piece) will come off door panel

B: The door is held on by 2-screws, 7-plastic snaps/plugs, and 1-plastic plug.

The screws are located: bottom of hand hold and the other behind the handle, both covered by little covers that have to be pryed off to access the screws.(hint: the screw with the built in spacer goes behind the handle when you are trying to reinstall)
The 7-plastic snaps: 3 across bottom and 2 on each side. Not visible, they are mounted to the inside of the panel.
The 1-plastic plug is visible at the upper front of the panel and is the same color as the surrounding trim


C: Take off the big plastic triangle piece above the door panel and behind the mirror. Pull/pry off. It has 2 snaps holding it on. one near bottom and one near the front.

D: Light lens prys off from bottom. Unscrew (1/4 turn) the light assembly with bulb still intact from backside of panel

E: Remove the Hand-Hold/window switch assembly:

SOURCE: Honda Accord Outside handle broken and Child lock is on.

Remove the panel and disable the child lock or some cars have an option to just bypass the child lock either or

SOURCE: 1992 Honda Accord (LX) Instrument Cluster Replacement

Same as 2 dr, or a stick.
There are bezel screws that hold the plastic trim (pointing up towards the windshield), you nee to remove these 2 screws. The bottom section is clipped in. Tilt the steering wheel down as far as it will go.
Once you have the bezel off, there are 4 screws holding the cluster to the dash. Remove them and gently pull the cluster forward. Reach around (expect to get scraped knuckles) and unclip the speedo cable, and two large multipin connectors. Don't force anything.
Getting the cluster out after this point is a test of your patience. It only seems to come out one particular way.

SOURCE: 2005 honda accord brake light does not work

have you checked the switch under the dash at the top of the brake pedal?? they come loose so may only need adjusting ........the pin on the switch has to be clear from the pedal to work if it still makes contact when you press pedal down then that will be the prob, if it still does not work when pin is clear of plate , take cable of switch and bridge them together if that works it the switch....... if still no lights fault is in the wiring loom/ relay or light unit