Door lock pump on whilst car is locked

[S3ben]

Hi I was checking my tyre pressures and noticed that my door lock pump or locking mech is making a noise when the car is locked. It had been locked for 45-60 mins before I went and check tyres. Dose anyone know what it could be.
Thanks

 

[Andrew@A.L.D]

you have a air leak somewhere i would say

 

[S3ben]

you have a air leak somewhere i would say

Thanks for quick reply I'll have good look around at the weekend. Thanks
Also would this drain the battery a bit?

 

[Andrew@A.L.D]

For sure it will