2012 s60 and the car has been sitting but I’ve been trying to start it and drive it around every now and then. Went out one time and had to jump the battery let it run and charge up for a little. It would start for about a week then it died again, so I just went ahead and replaced the battery, I have the new battery in and it still has no power none what so ever, also side note my key fob stopped working a while ago it started the car but no longer locked and unlocked it. Thank you for your help

 

what do you mean by no power? does the car start? does it start but not rev past 2500 rpm etc? what diagnostics have you done ie measure system voltage, scan for OBD codes? If it starts and won't rev, you may be stuck in limp mode. Start by scanning for codes with a reader then clear all the codes. start it up and check if its stll low on power. Scan a second time to see if any codes reset. Finally try disconnecting the battery for 15 minutes, reconnect then restart to see if that helps. as to the fobs, only thing to try is doing a lock / unlock 5x to see if that does a reset as well