How to Start a Porsche with a Dead Key Fob
Starting Your Porsche
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The Porsche Entry & Drive System may or may not feature a dummy key that needs to be turned to start the vehicle. If your vehicle does not have this key, the car’s key fob, even if its internal battery is dead and won’t let you in, will start the car. It will be recognized once placed into the ignition switch.
If there is a dummy key, it will need to be removed in order to use the key fob in the ignition. The owner’s manual holds a somewhat complicated set of removal instructions that will leave you exposed and vulnerable for far too long. Ignore the instructions and do the following.
Make two attempts to start the car normally. The car’s instrument panel will then note that the dummy key can now be pulled away. Once this is done, the vehicle’s key fob can be inserted into the ignition switch and the car started normally. The fob will be recognized even if the fob’s internal battery is dead.
Click here for videos of both the open and start processes.
Porsche Hybrid
The Panamera Hybrid continues the use of a dummy key in the ignition. However, if the fob’s battery is dead, a new process is needed, which includes the use of a back up location for the fob.
Lay the key fob, buttons up, in the compartment in the front of the center console to the left of the cup holders. Turn the ignition dummy key to the start position (position 2) and back to off. Turn the dummy key back to the start position a second time and the vehicle will start. The instrument panel will also acknowledge that the key fob has been recognized.
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Remember that only proper service and repair procedures will ensure the safe and reliable operation of your car. In addition, proper safety procedures and precautions, such as the use of safety goggles, the right tools and the equipment should be followed at all times to eliminate the possibility of personal injury or improper service which could damage the vehicle or compromise its safety.
These posts are for information sharing purposes only, and should not be used in lieu of an OEM service manual or factory authorized service procedure. We are not in the auto repair business nor do we publish automotive service manuals. Nothing we include on these pages and posts has been reviewed, approved or authorized by any vehicle manufacturer.
Technology is always changing and what is current and accurate today may be literally out-of-date and inaccurate tomorrow. And when it comes to the current state of flux in the auto industry, nothing is more true.
The author has 25 years of automotive experience and has assembled the most extensive collection of symbols and warning lights anywhere (over 1,000!) and can help you open and start any keyless start car with a dead key fob battery. BA, St. Joseph’s College, ME: MS, Rensselaer Polytechnic Institute, NY
To start a GMC model with a dead key fob, a pocket to place the transmitter will need to be identified. Once the fob is properly placed, the vehicle will recognize the fob and the vehicle can be started as normal. In the new Hummer EV, the pocket is the rear cup holder, as shown to the right. Place the key fob in the cup holder with the buttons facing up and start the car as normal, pressing the brake pedal and the POWER button while in park or neutral.
The large SUV’s from GM, including the GMC Yukon, feature a transmitter pocket located in the face of the front of the inside of the center console, as shown to the right. Slide the transmitter into the pocket with the key ring facing out, buttons forward (in a Chevrolet Suburban we had on hand, the engine started with the buttons facing either way). It is a loose fit, but don’t be concerned. With the vehicle in Park or Neutral, press the brake pedal and the Start / Stop ignition button as normal. Check out the 
In an all to common inability to leave well enough alone, this is changed in the Yukon with bucket seats for the 2021 model year. Its changed again in 2023 (below). This will also cover the 2020 and newer GMC Sierra. There are now three back up locations for the transmitter. Again if the vehicle has bucket seats, the transmitter is dropped between the two cup holders (right). In the Sierra in 2022, the cup holders are one in front of the other (far right). In this case, drop the transmitter in the space between the cup holders and the shifter.
In both the Sierra and Yukon models in 2021 and beyond without bucket seats, the back up transmitter pocket is a slot at the back of the lowest storage bin (there are two of them) in the center area of, and beneath, the front seat. In all cases, once the transmitter is in place, press the brake pedal and the Start / Stop button together, starting the vehicle as normal.
The Terrain small crossover SUV got its first taste of keyless ignition in the 2018 model. It has bucket seats and the back up location is in a cup holder, nearly identical to the Yukon above, and exactly what the Yukon with bucket seats uses beginning in 2023. The cup holders are side by side (right) and the left side cup holder is used. As always, face the buttons up and with the vehicle in Park or Neutral, press the brake pedal and the Start / Stop ignition button as normal.
In the Acadia crossover, the pocket for the transmitter is located in the face of the rear of the inside of the center console. Slide the transmitter into the pocket with the key ring facing out, and the buttons up (or however it will fit!). With the vehicle in Park or Neutral, press the brake pedal and the Start / Stop ignition button as normal. And we have a 
The location is changed in the Acadia for the 2020 model year, though 2023. For those years, the back up slot is at the bottom of the center console, as shown to the right. The console liner must be lifted away to expose what is a fob-shaped depression. Once again, with the transmitter in place, press the Start / Stop button and the brake pedal together to start the vehicle.
In 2023, the Canyon gets its first look at keyless start. In this case however, the back up spot is in the right cup holder (right image). Evidently, just to be different. And again, with the transmitter or key fob in place, press the Start / Stop button and the brake pedal together to start the vehicle as normal.
Note: If you have made an attempt to start the vehicle without success, there may be residual pressure in the brake system and a new warning light may appear (left) or text message to Step on the Brake. Press the brake pedal very, very hard when trying to start the vehicle again to be sure that the release switch behind the pedal is engaged. Or wait a few minutes and try again.
Keyless or push button start GMC models use the third of three GM key styles. A mechanical key is held inside the fob and is needed to get into the vehicle.
Acadia and Terrain. To remove the cap, pull the door handle out to the open position. Insert the key into the slot on the bottom of the cap (3, right).
(IA) (remote control or ‘clicker’) key styles. Two of the key fobs use a sliding release on the back side to release the key. Two new key fobs use a push button to release the mechanical key, and one is much easier than the other to use. Another holds the key inside the fob itself and is really difficult to remove.
To release the mechanical key blade in your IA key fob, slide the release on the back of the transmitter and pull the blade out. You can now use the mechanical key to unlock the driver’s door.
(pull is straight up and off) to access the key blade. Its awkward and may need a little practice. That mechanical key can now be used to unlock the driver’s door.
This fourth and unusual Intelligent Access key fob is found with only a handful of Ford models. The mechanical key blade is found on the back of the fob. To remove it, push the buttons on either side of the key fob.
to use. It has a push button on the front of the mechanical key itself near the key ring space. Simply push the button and pull the mechanical key away from the IA key.
However, the 2017 Continental and then the 2020 Aviator and the 2024 Nautilus bring a very new wrinkle into the mix. The key hole is hidden by a spring-loaded cover and is in a very different location. The key hole has been placed in the chrome molding beneath the driver’s door mirror and behind the imprinted words ‘Continental’, ‘Aviator’ or ‘Nautilus’. Simply insert the key and turn to unlock the car. The door will spring open. We still in 2024 have no word on how well the key hole cover will behave in icy weather.
In addition, the Navigator, updated in 2018, hides the keyhole in plain sight. The door handle is a single piece. The key hole is exposed by simply pulling the driver’s door handle away from the body of the car. It is seen angled outward at the back end of the handle. Insert the mechanical key and turn clockwise. Remove the key and release the handle. The door will open on the next pull. Note that the alarm will sound in a minute or so if the car is not started in time.
Finally, the new Nautilus model hides the key hole under a cap at the back of the driver’s door handle, which must be removed. To do this, insert the key blade into the slot on the bottom of the handle (right image, bottom arrow) and press up. While holding that upward pressure, move the cap rearward to release it. Gently remove the key while doing so. Yes, the effect is that of prying off a piece of your car but its OK and necessary!
There are three basic locations to try, as shown in the image, but experience tells us you might just as well skip to the last one. The first, top to bottom, is to simply drop the key fob into the cup holder. If this fails, hold the key fob against the front of the console, as we are doing in the image (second). There are several places that can be tried in this case alone.
If all these fail, the next recommendation is to remove the battery from the fob and run through the options again. As it happens, this is exactly what we had to do with the Model X we had and we landed at the base of the console before the car recognized the fob. That location, with the key fob resting in place, is shown in the second image. The fob was recognized at last and we were able to operate the car.
If you were given a key card, place it against the left side of the of the space at the front of the center console just below the screen, as shown to the right. The vehicle will recognize the card, the instrument panel will come to life and the car will be ready for action. Don’t lose the card!
If your mobile phone has gone dead or is missing, place the key card on the center console behind and between the two cup holders. The car will recognize the card and will allow it to be driven.