Keyless access systems have revolutionized car security and convenience for good, as drivers find it simpler to unlock, start, and lock their cars without a traditional key. However, despite the advantages, keyless entry and ignition systems can sometimes crash, leaving the car owners frustrated. From a dead key fob to a push-button starter that won’t cooperate, or a key stuck in ignition, knowing what to look for in common faults and fixes will be a timesaver.

At Carkez we specialize in helping drivers diagnose and repair vehicle access issues. Here in this guide, we are going to outline the most common keyless access system issues and give you practical solutions to get you driving quickly.

Dead Key Fob Battery

Dead battery is also among the most frequent causes of keyless entry system failure. If your key fob is not working or is struggling to unlock the doors, the battery is low.

Solution:

• Replace the battery in your key fob with a new one. Most key fobs contain a small coin-cell battery, which you can find at any auto parts or electronics store.
• If that doesn’t work, hold the key fob closer to the start button because some vehicles have a low-power fob backup mode.

Defective Key Fob

Despite a fresh battery, the key fob itself may sometimes fail due to internal electronic malfunction, damage, or software errors.

Solution:

• Use an alternate key fob if you possess one.
• Reset the key fob by pulling out the battery and pressing the buttons several times before putting the battery back in.
• If it still does not work, reprogram the key fob or replace it. Some locksmiths and dealerships provide reprogramming services.

Weak or Dead Car Battery

Weak or dead car batteries will stop your keyless system from working effectively since such systems need a steady power source to connect with the key fob.

Solution:

• Check the car battery and replace it if needed.
• If your battery is weak but not dead, jump-starting the car can possibly restore the link between the key fob and the vehicle.

Unresponsive Push-Start Button

If you press the push-start button but nothing occurs, the problem might be with the key fob, car battery, or the button itself.

Solution:

• Make sure the key fob is within the vehicle. Certain vehicles will not start if the fob is more than a few inches away from the sensor.
• Press the brake pedal hard while pressing the start button.
• If the problem continues, use the manual key slot (if equipped) to start the vehicle.

Keyless Entry Not Unlocking Doors

At times, the keyless entry system will fail to unlock the doors, despite the key fob functioning properly. This is perhaps caused by sensor interference, a software error, or a malfunctioning receiver module.

Solution:

• Determine if other electronic devices are interfering with the signal from the key fob.
• Attempt to open the car manually using the emergency key within the fob.
• Reset the system of the vehicle by removing the battery for several minutes and reinserting it.

Security System Lockout

Certain cars come equipped with inbuilt security that may lock out the keyless system when an incorrect fob is entered several times. This may occur when the key fob battery has been replaced or when an incorrect key is used to try to unlock the vehicle.

Solution:

• Let it wait for a few minutes, as some vehicles automatically reset from a security lockout.
• Unlock the driver’s door using the mechanical key (if available).
• Consult the owner’s manual for detailed reset procedures.

Key Fob Signal Interference

Wireless signals from other devices, like mobile phones, radio towers, or electronic gates, may occasionally interfere with your keyless entry system.

Solution:

• Go to another location and attempt to unlock the car again.
• Keep the key fob away from other electronic devices when not in use.
• If the issue continues, have a professional inspect the key fob’s signal strength.

Ignition System Troubles

Although keyless systems do away with conventional keys, a few vehicles retain a backup key slot. Should you ever be stuck with the key lodged in ignition, then a jammed steering wheel, ignition debris, or a mechanical glitch might be the cause.

Solution:

• Turn the steering wheel to the left and right while carefully jiggling the key.
• Check the key slot for any dirt or debris and clean it if needed.
• If the key remains stuck, call a professional locksmith or mechanic to help.

Software or Firmware Bugs

New keyless entry systems use software to operate correctly. At times, a software bug can lead to key fob connectivity problems or fail to make the vehicle accept the fob.

Solution:

• Look for your vehicle manufacturer’s software update.
• Reset the keyless system by turning off the car battery for a few minutes.
• In case software problems continue, go to a dealership for a diagnostic test.

Faulty Door Sensors

Keyless entry systems use door sensors to identify the key fob and unlock the vehicle. If the sensors get dirty or damaged, the system might not function properly.

Solution:

• Wipe the sensors near the door handles with a soft cloth.
• If the sensors seem to be damaged, they might have to be replaced professionally.

Final Thoughts

At Carkez, we know how annoying vehicle access issues are. That’s why we provide professional advice, fix, and solutions to keyless entry issues. If you ever encounter an issue that you can’t fix yourself, don’t worry, just call on a professional for help.