500 Key not working properly

[Rachelalford]

Hi, new to this forum and can't work out of this is the right place to post or not.
Recently my Fiat 500 key seems to have stopped working properly. The key fob is sending a signal as the lights go off fine but the doors won't unlock and I can't get into the boot. Might be a silly question but is it just a case of a battery needing to be replaced or could it be something else?

 

[swifty500]

Firstly, check the voltage of the battery-low voltage in 500's batteries causes all sorts of problems-should be 12.3-12.8v pre-start

But more likely, it is the dredded and ever common boot loom wire
Check the battery first, then pull the rubber off the wiring between boot and body at top left of boot and inspect wires

 

[typecastboy]

I'm assuming you've tried the obvious like disconnecting and reconnecting the car battery. I know it sounds obvious but that does cure many electronic glitches.