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How to Fix a Key Fob That isn't Working

If your key fob isn't working, local a few easy steps can be taken to fix it. First, ensure that it's not your backup remote.

If your backup remote can unlock and lock the doors of your vehicle, it is likely that the primary remote isn't functioning. The most frequent causes of car remote key failure are battery or circuitry issues.

Battery

The battery inside a key fob can get worn out over the course of time. It is simple to replace a battery. However, it is important that you use the correct type. You can refer to the owner's manual or contact the manufacturer to find out the right kind. It's recommended to inspect the battery compartment thoroughly, as dead batteries sometimes release caustic chemicals that could cause damage to the remote. If changing the batteries doesn't solve the problem it could be because there are other issues that require attention from a professional. For example, if buttons seem to be stuck or damaged, it may be necessary to disassemble the remote and rebuild its components. You could also try reprogramming your car to recognize the new key fob.

Buttons

Key fobs may become dirty and worn out from frequent use. It is not uncommon for buttons to stop functioning, or require a hard press to make them work. This can be a huge hassle especially if you're away from home and you need to start your vehicle. Even broken or damaged buttons are often fixable with a bit of time and tools you already have at home.

First, ensure that the batteries are charged correctly and that the indentation on the back of the button is filled. Take the remote apart and examine the circuit board. Check for evidence of rust, or other indications that the buttons have been damaged or worn out. For example the paint that conducts electricity could be missing. Use a Q-tip, dipped in rubbing alcohol to gently clean any membrane contact that is damaged or has conductive paint missing. Don't rub too hard in order to damage the conductive paint and prevent the button from firing when you press it.

Also, carefully check the battery connector's terminals to ensure an unattached solder connection. Soldering them back to their original position can restore the button's functionality in the event that this is the case. You can use the same process to restore functionality to any other loose connection within the fob.

If, for instance, any of the buttons made of rubber that are on the front of the key fob stop working or require a very long press to function it is likely the graphite disks on the back of the button are wearing out and local require replacement. This can usually be done by rubbing a pencil on the disks, which will bring the button back to working.

If none of these solutions work, or if you still cannot get the button to respond when you press it hard, it is possible that the circuitry has failed. This can be fixed by a quick clean, and re-soldering, but it is best to have an extra fob on hand in the event that this method does not work for you.

Circuitry

The circuit board inside your remote control may be dirty regardless of whether the buttons on the key fob work or not. The issue can be solved by a thorough inspection. The most frequent causes of dirty circuit boards is water and damaged cases. A damaged case could let water and other debris into the circuit board, causing it to short out. Water can also eat through pins and vias, which are small connectors found on the board.

If you're handy enough to open up your key fob and don't mind making a mess, we can remove the solder from the buttons and put new ones in their place. Also, you should check the connections between the battery terminals. If they're loose, the buttons could not function or get stuck in their down position. Soldering the terminals back to their original positions is often enough to restore a non-working fob to working.

Non-Remote Transponder Chips

Sealed non-remote transponder chips are more durable than the remote fobs they are contained in, but they can still be damaged by a hole that is that is drilled into them or over by a lawnmowers blade or electronic car key repair near me door handle. Most of the time non-remote transponder chips fail, and this can be attributed to blowing fuses.

If you're not confident opening the key fob, you may remove the circuitboard and utilize a multimeter to determine if the diode is working correctly. If you're not comfortable doing this, head to your local hardware store or Oreilly's, and they'll usually have a RFID frequency tester that can let you know whether the key fob is sending a signal.

Programming

Key fobs aren't impervious to destruction and are susceptible to being damaged by a lot of things. They may lose their connection with the receiver inside your vehicle because of shocks or a low battery, requiring reprogramming. A professional auto locksmith or main dealer, can reprogram your keyfob and get it functioning again. If resetting or replacing your key fob fails, you may need to replace it.