2005 s40 t5 power system urgent service light!

[marcm1]

Ok here it goes, 2 weeks ago the 'power system service urgent' light came on, I replaced the batttery 2 months ago but took it out and had it checked and came back fine, then had alternator checked and also fine, then yesterday took it to autozzone which his reader said sterter system failed, so before anything else I took out starter and had it checked and it was fine, so now what are my options? there are no codes on file to check on the 'power system service urgent' light is on, any suggestions??????