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Reasons Your Car Key Fob Is Not Working After A Battery Change
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Reasons Your Car Key Fob Is Not Working After A Battery Change

The most common culprit behind a failing car key fob is a dying battery. As the key fob battery runs low, the device's transmitter loses its range resulting in weak signal strength, inconsistent results, and having to click repeatedly to unlock doors. However, your car key fob may not work even after a battery change and this happens due to a number of possibilities.

Let's look at the possible reasons your car key fob is not working after a battery change. 

  1. Internal Damage: Another common culprit behind a failing car fob is damaged internal components. Perhaps the receiver in the car is damaged, the wiring is worn out, or some buttons on the key fob are loose. This device is designed to transmit a signal that communicates with the receiver of the car. When there's a damaged component in either the car or key fob itself, then the communication won't happen. A key fob can get damaged as a result of being struck, and when it's dropped occasionally or submerged in water. If you suspect internal damage to be the reason your key fob is not working, call a nearby locksmith to inspect your key fob and provide you with a reliable solution.
  2. Faulty Ignition Cylinder: In some cases, a key fob can open your car door but fail to start the car. When this happens, you're probably dealing with a damaged ignition cylinder. Your key fob is designed to communicate with your ignition cylinder in order to start the car. If the ignition cylinder gets damaged, the key fob won't work. When your ignition cylinder stops working, be sure to call an experienced locksmith to make repairs.
  3. Key Fob Not Programmed: A key fob might lose its programming after you've replaced the batteries. In this case, you'll need to have the key fob reprogrammed so that it can communicate with the receiver in your car door. This is an additional security feature included in a key fob to ensure your car won't be unlocked by any random key.

How To Program A Key Fob

Step 1: Manually unlock your car door with your key and lock all car doors.

Step 2: Turn on the ignition and press the "Lock" button on the key fob.

Step 3: Turn the key back to the "Off" position and then turn the key to the "On" position after five seconds.

Step 4: Repeat step 2 and step 3 at least three times and end with the key in the "On" position at the end of the cycle.

Step 5: Listen for a lock sound that indicates that you've entered the programming mode. Lastly, press the lock button within five seconds of entering programming mode, and the process will succeed.

If you're unable to reprogram your key fob, call an auto locksmith for assistance. At GreenPro Locksmith, we provide affordable key fob programming, key replacement, ignition repair, car key duplication, and many other locksmith services.

Dec 10, 2021
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