This is my first thread. I own a 2007 Volvo C70 2.5T Auto. The car will not start up after leaving it for 2 days. Every time the car is unable to start, it shoots an alarm system maitenance required code, but it goes away after about an hour of driving. The windows do not auto roll down or up. What could the issue be? Alarm siren module? Or is it something much worse?

 

How old is your battery? (and what brand and size?)

Have you used an inductive ammeter on a battery cable to determine if there is a draw/drain on the battery when the car is off?

You auto up/down windows lose their programming when the battery goes dead or is disconnected. Simply reprogram them.

 

The battery is only a couple months old. I have not yet been able to test amp draw with the car off, that is something I am going to do this weekend. I replaced the alarm siren module from a junkyard this weekend and hoping it fixed the issue. I also noticed when I lock the doors with the key, the orange door lights stay on.