Car Key Fob Not Working?

A key fob that stops working can leave you standing next to a car that will not unlock or start. Before you assume the worst, check these common causes.

Car key fob programming in San Diego

1. Dead or Weak Battery

This is the most common cause. If the fob only works close to the car or works on and off, replace the battery first. Most fobs use a coin cell battery that you can find at any store.

2. Worn Buttons or a Broken Case

After years of use, the buttons wear out and the case cracks. Often the electronics are fine and only the shell needs replacing.

3. The Fob Lost Its Programming

Some fobs lose sync with the car, for example after a battery change or water damage. Reprogramming can bring them back.

4. Water or Drop Damage

A fob that went through the washing machine or took a hard fall may have a damaged circuit board. In that case, a new fob programmed to your car is usually the fix.

5. A Problem with the Car, Not the Fob

A weak car battery or a fault in the car’s receiver can look like a fob problem. If a spare fob does not work either, the issue may be in the car.

When to Call a Locksmith

If a new battery does not help, a locksmith can test the fob, reprogram it or supply and program a new one at your car. See our key fob replacement and programming service, or call Key One Locksmith 24/7 at (619) 960-8463.

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