How to Fix a Key Fob That isn't Working

If your key fob doesn't work and you're not sure why, you can fix it by following a few simple steps. First, ensure that it's not the backup remote.

If the backup remote is able to lock and unlock your repair car key doors, then there is likely an issue with the main remote. Most problems with mobile car key repair near me remote keys are caused by circuitry or battery issues.

Battery

The battery in a key fob can be worn out over time. It is quite simple to change out batteries, but it is important to ensure that you select the correct one; you can look in your owner's manual or contact the dealer for the manufacturer to determine the type of battery you need. It is also crucial to check the battery compartment, since dead batteries can leak caustic chemicals which can damage the remote. If replacing the battery does not solve the issue there may be additional issues that require professional attention. For instance, if buttons seem stuck or broken it could be necessary to disassemble the remote and rebuild its components. You could also try reprogramming the vehicle to recognize the new key fob.

Buttons

Key fobs may become dirty and worn-out from frequent use. It is not unusual for buttons to stop working, or to require a hefty press to make them work. This can be extremely frustrating especially if you're away from home and need to start your vehicle. Even malfunctioning or worn-out buttons are often fixable with a little effort and the tools you already have at home.

First, ensure that the batteries are properly charged and that the indentation on the back of the button is filled. Then, open the remote with care and examine the circuit board. Look for signs of rust or other indications that the buttons are worn or damaged. For example, conductive paint may be missing. Use a Q-tip that has been dipped in alcohol to gently clean any membrane contact that has worn-out or where conductive painting is missing. Avoid rubbing too hard, as this can erode the conductive painting and prevent the button from firing when it is the button is pressed.

Also, be sure to check the battery connector terminals for an unattached solder connection. Soldering them back to their original position will restore the button's functionality if this is the case. You can follow the same method to restore functionality to any other loose connection within the fob.

If any of the rubber buttons on the front of the keyfob isn't functioning or require to be press extremely hard, the graphite disks at the back of the button could have worn out and require replacement. This can be done by rubbing a pencil across the disks, which will bring the button back to working.

If all of this doesn't help or if the button doesn't respond to a hard press, then it may be the case that the circuit board itself has become damaged. This can sometimes be repaired with a quick clean and refitting, but it's ideal to have a spare fob in case this method doesn't work for you.

Circuitry

The circuit board in your remote control may be dirty, regardless of whether the buttons on the key fob function or not. This problem can be resolved through a thorough examination. The most common causes for dirty circuit boards is water and damaged cases. A broken case can allow water and other debris into the circuit board, causing it to short out. Water can also eat away at pins and connectors that are small on the board called via's.

If you're able to remove your key fob and aren't afraid of a little mess, we can remove the solder from the buttons and solder new ones in their place. Also, it's worth checking the connections between battery terminals. They can become very dirty and if they're loose, the buttons might not work or even stay in their down position. Soldering the terminals and buttons back in their place is generally all that's needed to return keys that are not in working order.

Non-Remote transponder chips

The sealed non-remote chips are more durable than Remote key Repair fobs. However, they can be cracked when a hole is made in them or if a car door handle or lawnmowers is pushed over them. Most of the time, non-remote transponder chips fail, and this could be attributed to an exploded fuse.

If you're not comfortable opening the key fob, remove the circuitboard and utilize a multimeter to determine if the diode is functioning correctly. If you're not comfortable with this, you can go to your local Oreilly or hardware store and utilize their RF frequency tester. This will inform you whether the key fob transmits a signal.

Programming

Key fobs aren't indestructible and are susceptible to damage by a lot of things. They may lose their connection with the receiver inside your vehicle due to shocks or a low battery, which calls for the reprogramming. A professional auto locksmith or a main dealer can reprogram your key fob to get it functioning again. If resetting or replacing your keyfob does not work, you may need to replace it.