The key fob will often have a hidden key inside, so if you don't have a physical key for your vehicle, then check the fob for a release button or switch. It eventually goes away. Hold key next to marked surface.” On the steering column, right below the wiper lever, there is a small indentation with a FOB-shaped icon and a signal icon above it. The other issue you may run into is that some car doors don't have any visible place to insert a key. The car battery is within a year new. I have checked the Battery in the Fob and it is fine. 2011 Sonata, Key Fob not detected. I have also have tried to put the FOB in the center console to see if it would recognize it but still no luck! I can start it with inserting the Fob in … So I am not the only person with this specific problem. Half the time that one of my front doors open with the car running, the car thinks that the key fob is leaving the car and I get an "access key not detected". The problem started when I didn't use my car for a few months due to the coronavirus and went dead. The Key FOB isn't being detected for some reason, I've replaced the batteries in both FOB's and still no luck. You press the pushbutton with the butt of the key FOB and that puts it close enough to the antenna to energize and power the RFID chip and start the car. Anybody else ever get that? I actually found this issue on another Jeep forum and that sent me down the path to test it out. 2) The key fob works but is no longer recognized by the BCM. If you attempt to start car like usual, a prompt will appear on instrument cluster saying “Key not detected. Last night my key fob would not open my 2011 sonata, so I took the key out and unlocked the door. I have a similar problem; no key detected. If the backup remote is able to unlock the doors, then you know that it is a problem with the key fob and not with your vehicle’s locking system. Same thing happening to some with iPhones, too. 1) Defective key fob. I pushed on the brake to start the car but the message said key not detected. Issue: The push button start will not work even with the key in the center console. Cadillac CTS / Cadillac CTS Owners Manual / Instruments and Controls / Vehicle Messages / Key and Lock Messages / ELECTRONIC KEY NOT DETECTED If the vehicle has the keyless access system, this message displays if the vehicle does not detect the presence of a transmitter when you have attempted to start the vehicle or a vehicle door has just closed. Cell phone (Android w/Bluetooth) and key fob in different pockets - all of my issues go away - 100%. The push button can not be removed. Press your dead key FOB flat against the indentation. I have tested this for 2 days now. Make sure that your key fob battery is not dead. Put your foot on the brake and push the start button. While it should last longer than three years, any number of things could have happened to it that would kill it. I can't unlock/lock the car with it or even get it into accessory mode. I can start the car via placing the key on steering wheel(2014 Ford Escape push-button start), but the key is never recognized to open/close, etc. The key fob is still sitting in storage area below the HVAC. If you have a second key remote, and you haven’t already done so, check to make sure this works so you can be certain it isn’t a problem with the door lock functionality. Tried disconnecting battery cable and letting it sit. But the RFID chip still works the same way, BUT the RFID chip is in the butt of the key FOB (the opposite end of the opening to put the key ring through). Retried to start car several times before it finally started. If the key is not recognized, then put it in the center console in order for the vehicle to “read” the key. 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