What to Do When the Key Fob Battery Dies and Push-to-Start Doesn't Work?

[MatteoAnn]

Here are the methods to start the car when the key fob battery dies and push-to-start doesn't work: 1. Emergency start - Use the metal key's keyhole to start. Most cars have a keyhole for the metal key. Locate the keyhole and insert the key blade from the remote key fob to start the car like a conventional vehicle. 2. Smart key slot - Push-to-start models usually have a smart key slot, which may be located inside the center console, near the gear shift lever, under the armrest, or in the cup holder area (refer to your vehicle's owner's manual). When the smart key battery dies, insert the key fob into this slot. The vehicle will detect the key's presence and allow startup. 3. Maximize smart key detection - After the key fob battery dies, press the key fob directly against the push-to-start button or other designated detection area. If the vehicle senses the key, it will allow you to start the engine.

[DiBeckett]

Last time I also encountered this annoying situation when the key fob battery died and the push-button start failed. I was on my way to the office when pressing the start button got no response, then I realized I hadn't changed the battery in two years. I quickly took out the spare key from my bag and tried it - it worked. If you don't have a spare key, you can press the key fob against the start button area as some cars have an emergency induction function for temporary starting. Later I went to a hardware store and bought a new flat round CR2032 battery. Just gently pry open the key fob back cover with a small screwdriver, replace the battery and reassemble - the whole process takes just minutes. I recommend keeping a spare key or battery kit in your car to avoid being stranded. Also, regularly check the key fob indicator light brightness - replace the battery when it dims rather than waiting until it's completely dead. By the way, different car models may vary, so it's best to check your owner's manual for emergency start methods as most vehicles have backup mechanisms designed.

[McHannah]

As someone who drives all year round, I've encountered several instances where the car key battery died. The car's push-to-start system relies on key signal detection, and once the battery is depleted and the signal can't be transmitted, the start button won't respond. Emergency solutions include placing the key close to the starting point near the steering wheel to attempt direct induction startup; or checking if the key has a physical key component—if it does, insert it into the door lock to open the door, then sit in the driver's seat and press the start button to ignite the car. It's best to keep a spare set of new batteries in the glove compartment, as replacing them is simple—remove the key cover, take out the old battery and replace it with a new one (pay attention to the positive and negative polarity), then retest the locking function to ensure it works properly. A long-term solution is to replace the battery every two years or so to prevent aging from affecting performance. I make it a habit to address the issue when the key battery is running low, such as when the button sound becomes quieter or the indicator light dims, ensuring safer driving and avoiding the hassle of being stranded and needing a tow truck.

[KathrynFitz]

I’ve been there too—suddenly finding the key fob dead and the push-to-start failing, leaving me unprepared. The safest approach is to immediately pull over in a secure spot to avoid forcing the system and causing damage. Try starting the car with the spare key if available. If not, check if the key fob has a small keyhole or physical key component—use it to unlock the door and start the engine manually. Replacing the battery yourself is simple: just get a CR2032 coin cell, carefully pry open the key fob’s casing, and swap in the new one. But if you’d rather skip the hassle, contacting your dealership or roadside assistance is the quicker, more professional solution. To prevent this, avoid storing the key near your phone for extended periods, as magnetic interference drains the battery faster. Regularly test the battery and replace it annually to avoid bigger issues—after all, driving safety comes first, and neglecting small details can lead to major consequences.