Peugeot 207 cc unlocking itself overnight

[peugeot207cc2008]

Hello guys

I've got a really strange new problem with my Peugeot 207cc 2008 1.6 VTi car's central lock system, wondering if anyone had the same issue.

Whenever I lock the car (no matter if I use the key or the fob), everything works fine for about an hour (car unlocks fine with the fob/key).

After about an hour later, the remote key stops working at all (I can’t unlock the car with the remote, nothing happens, no blinking, no noise from the car). Luckily, using the key itself works so at least I can use the car.

But there is a bigger issue - after this one hour - I can simply unlock the whole car by opening the bonnet (with the button on the rear of the car, not the fob, nor the door handles). This is obviously a big security issue.

Car’s battery is about two years old, starts fine, so I don’t think it’s an issue with that. I’ve also checked the Park shunt and it’s in the correct Customer mode.

There is one additional electrical weirdness, but it’s always been this way so I don’t think they are connected: the average fuel consumption on the central monochrome screen resets every time I start the car. Nothing else resets, not the clock, nor the radio. I’ve tried a BSI reset but it did not fix this issue.

Any advice? Anything I could check?

[GiveMeABreak]

I would suggest a diagnostic using Diagbox if possible. That should reveal any logged faults in the system that may be causing a problem.

Here's the guide to use for info: BSI Reset / Battery Disconnect / Reconnect Procedure