How to Start a Civic When the Key Fob Battery is Dead?

[VanJune]

Pull out the key. Generally, the mechanical spare key is hidden inside the remote key fob. Open the car door. Typically, the mechanical key can only unlock the driver's side door. If you need to open other doors, you must first enter the car and manually unlock them. Press to start. When the key fob battery is dead, the transmission power is relatively low, which may prevent the vehicle from starting.

[MacDaniella]

When my Civic key fob battery died before, I found the hidden mechanical key on the side of the fob. Inserting it directly into the small hole next to the driver's door handle unlocked the car. After getting in, I flipped the key fob case and placed it against the start button near the steering wheel. With my foot on the brake, pressing the start button fired up the engine. This method has worked reliably for over three years - the key fob can still initiate short-range RF startup even when dead. Remember to replace the CR2032 coin battery promptly, available at convenience stores or auto shops.