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#1
21st July 2020, 07:50 AM
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Bit of a Strange One... Remote Fob Blocked?
Couldn't open the car with the fob last night, had to use the key barrel under the handle. Had to start the car with the key in ignition. Got out, couldn't lock it with the fob either. Same story this morning.
Fob had a new battery couple of months ago and has been perfect, including all day away from the house yesterday. I can see the fob light flashing. Won't lock/unlock on the fob even when inside the car. The strange thing is... ...Same story with the wife's B7 A4. Since last night, her's is doing the same thing. Both unlock and start on the physical key. Gotta be interference from somewhere? Nothing changed in our house, don't recall anyone putting up a mast (5G! Terror!) on our close either! Just wondeirng if anyone else has experienced the same? 
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#3
21st July 2020, 08:53 AM
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No-one around though. I guess you'd need to be within 50 ft or so to do this.
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#4
21st July 2020, 08:59 AM
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Do the fobs (for both vehicles) work every time away from home?
__________________
Mark ------------------------------------------------------ 2002 FE S8 Ebony Black Pearl ------------------------------------------------------  ------------------------------------------------------ Cars Owned: The Tesla Era: 2020 Model S Performance Ludicrous+ (present) (Black, with all black premium interior and carbon fibre décor, 21" sonic carbon twin turbine wheels and FSD capability) The Audi Era: '97 A8 4.2 (Ming Blue) --> '96 A8 4.2 QS (Dark Green) --> '02 FE S8 (present) The Citroen Era: '84 BX 1.6 RS --> '89 BX 1.9 DTR Turbo --> '94 XM 2.0L Turbo --> '96 XM 2.0L Turbo Exclusive --> '00 Xantia Activa 2.0L Turbo The Banger Era: '76 1.2L Lada VAZ-2101 (Ruski Fiat 124) --> '80 1.7L Morris Ital HL, finished in Ermine White and Rust
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#5
22nd July 2020, 10:25 AM
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Key fobs work at 433.92Mhz whilst 5G in UK will work at 3.4 - 3.6Ghz initially so way apart in the frequency spectrum. Even 4G is between 800Mhz and 2.6Ghz. So it unlikely that interference from these sources is the cause. This 433Mhz band (its called LPD 433) is used for a number of other Low Power Devices including garage or gate openers and some outdoor home weather station products. But such devices would have to be very close to overpower the key fob transmitter when the latter is close to the car.
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2002 D2 S8 – Ming Blue, Valcona leather, Vavona wood insert, solar sunroof (to be fitted), Heated rear seats, extended leather pack, 18” Avus, ski hatch, Bose, auto dim rear view mirror, rear blind.
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#6
22nd July 2020, 11:08 AM
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Have the kids been playing with keys or something else pressing buttons many times while out of range?
They have fixed ID and variable code. I seem to remember that if buttons are pressed too many times while out of range the variable code will change so that car no longer accepts the ID/code combination and keys need to be re-synchronised to car.
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Currently 8less 2011 Q7 S Line 3.0TDI, 2016 Tesla Model S 90D 8 history: 2006 A8 Sport 4.2TDI quattro SOLD, 1997 S8, reached end of life with gearbox failure
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