I´m trying to figure out strange warning buzzer. It comes on about 5 seconds after turning ignition key on. It stays on no matter what. I´ve tried disconnecting the battery for abt 2 hrs, buzzer came back.Thx in advance.

you need a scan tool to read code. the buzzer sound you hear is the door system that is malfunction. look for the door switch that is stuck close or rubbing wires

It does not sound like a code problem,if it was you would have a check engine light, l would suggest pulling fuses one at a time until the buzzer stops and then see what is on that circuit,it maybe a relay that has a poor ground that will make them buzz,