You can start the 2016 Odyssey even with a dead key fob by using the hidden mechanical key to enter and then starting the engine with the Start/Stop button while the fob is held near the button or placed in the designated interior spot, after which you should replace the fob battery.
What you should know before you start
The Odyssey uses Honda’s Intelligent Key system with a Push Button Start. If the fob battery is dead, you won’t be able to start the engine in the usual way. However, there are legitimate, manufacturer-approved steps that allow you to start the vehicle and continue driving until you can replace the key fob battery.
Two reliable methods to start when the fob is dead
The following methods describe common approaches used on 2016 Odysseys with a dead key fob. Use the one that matches your trim and manual guidance.
- Remove the mechanical key blade from the fob. Use this blade to unlock the driver’s door if the fob’s wireless signal won’t unlock the door. Once inside, place the key fob near the Start/Stop button or into the designated interior area (as specified by your manual) and press the brake pedal, then press the Start/Stop button to start the engine.
- If your model supports an interior key slot or a proximity method, position the fob in that spot (or against the Start/Stop button) while you press the brake pedal and push the Start/Stop button. The engine should start with the dead fob battery, after which you should replace the battery as soon as possible.
The exact location and method can vary by trim level and market, so it’s important to consult the owner’s manual for your vehicle’s specific instructions. If you’re unsure, contact a Honda dealer or roadside assistance for guidance.
What to do if the car still won’t start
If the engine does not start after trying the above methods, there are additional steps you can take to regain access and operation safely. First, verify you’re using the correct fob for your vehicle and that the battery is indeed dead. Then:
- Replace the key fob battery. The typical replacement is a CR2032 lithium battery, but check your owner’s manual or the fob housing for the exact specification.
- Use the mechanical key blade to unlock the driver’s door and re-attempt starting the vehicle with the Start/Stop button and the fob positioned in the designated area.
- If you still cannot start the engine, contact roadside assistance or your Honda dealer for service. There may be a temporary immobilizer or sensor issue that requires professional help.
Having the battery replaced promptly ensures you won’t be stranded again. If the vehicle is safe to drive, scheduling a battery replacement for the fob or a new key might be covered under your vehicle’s warranty or via a key replacement service.
Additional tips for reliability
To minimize future issues with a dead key fob, consider keeping a spare battery in your vehicle or a spare fob battery in your wallet or car kit. Regularly testing the fob and replacing the battery before it dies can save you from inconvenient situations.
Summary
In a 2016 Honda Odyssey, a dead key fob doesn’t prevent you from starting the vehicle. Retrieve the mechanical key blade, unlock the door, and start via the Start/Stop button with the fob positioned in the appropriate area or near the button. If the car won’t start, replace the fob battery and consult the manual or a Honda dealer for exact instructions. Keeping spare batteries on hand and scheduling timely replacements helps avoid getting stranded.