I'm I obligated to tell landlord about a leak?

There is a leak in the garage but we didn't notice it until 2 weeks before we had to vacate. So I figured that I won't bother the landlord about it because she's kinda mean and deal with it myself and try to cover up my belongs with plastic. As I began packing up my things in the garage I noticed everything was damaged from mold. I still didn't make a big thing about it and throw everything in the trash. The landlord sold her condo and they the buyer had an inspector come out to inspect the place. There was a long list of things that needed to fixed, one of which is the leak in the garage. So the landlord called HOA and they said they will not fix the leak because the tenant didn't notify us. So my question is can she sue us for this? We live in california.