2005xc90
volvo
Im having a problem with my power system urgent
How to to reset it
Happened because hubby replace battery an forgot to wait the 5 mins before removal so now light pops up i need help please 9132933580

 

what do you mean "lights pop up"? not sure about the idea of waiting 5 minutes - more likely the battery terminals were not fully cleaned and fully tighted. I'd go back and check the battery voltage again to make sure its fully charged (should be 12.6V minimum) then check the terminals for tighteness.

Check out this vid. This guy was very thorough... one thing some people do is to hook up a 12V source to the jumper terminals under the hood to keep 12V in the system to keep power to various memory components like radio buttons

 

My car is a 2005 xc90
can you help me please my board says power system urgent!
Makes my car idle
Jerk loose power
Like my trans going out but had check said its good
Need response quick got work sat

 

You need an alternator most likely.