So my z120bt was having da same prob i emailed pioneer and they neva responded soooo i took my radio out popped my gps ant. out of its green holder and wiggled it and i started to get an signal soooo i took a file and filed da end down seems dat da lil prong in da middle on da unit has pushed down sum once i did dat it went to workin just fine not sure if this will help anyone else but it sure helped me .....................just wanted to share my findings wit sumone since this site help me upgrade my unit

you need to be fluent in ebonics to even read this!!

Yeah, my Google Translator (Gibberish to English) must be broken.

english, learn it.