@dc42 Thanks!!!
It seems that my caliper takes off measures above 140mm and I didn't noticed the first time (I mostly use it to take extremely small measuers). The homed height defined on M665 was higher by a couple of centimeters. Also the H parameter on M558 was too low, so all added up, the probe was expecting to trigger below the bed. I used a more analog method to take measures and it helped to solved the issue.
My biggest mistake was to think that the probe will trigger at any height regardless of the other parameters, so I didn't think about checking the heights on those commands. Once you point me in the right direction I was able to quickly solve this issue.
Thanks again!!!
Marcos