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Keyfob issue

Scott'sRam2020

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Oct 4, 2024
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I've got a 2020 Ram Limited. This only happens in my driveway. Most of the time the key fob or the door handle won't work to unlock or lock the truck. The dealer replaced the unit behind the seat and checked for leaks. One fob is new. I just figured out if I raise the fob above the door level it will work. Even then when I get in the truck it says keyfob not found. I have turned off the main breaker in the house to stop all electronic signals. I have left my cell phone in the house. This is my 3rd RAM and the only one to do this. Any suggestions?
 
Sounds like possible EMI. Could be emissions originating from your surroundings.
The RF hub wakes up and challenges the fob at 125khz, fob responds in the UHF range (do not know the exact frequency) identifying it self.
The theory of operation in the manual is little convoluted.
 

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