From a previous post I thought my battery was dead and I had a bad alternator.no dash lights or codes.
For some reason I tried a hard reset and it worked. But at least once a day it acts up and I have to do a hard reset??? I now carry a 10 mm wrench/spanner with me.
Any ideas?

 

could be a bad battery cable. Remove both cables, use vise to tighten the terminal clamp.
Good luck.

 

also check that the flap where you insert the key is closing all the way if not the modules will not sense the car is parked and it wont power down and will drain the battery . just spray the key with a lubricant and insert a few times to loosen it up .