my bluetooth obd reader showed same fault. turned out spark plugs where realy bad specialy 2nd cilinder

Thanx for guide. I also was getting alarm error every time I start the car. I got v70 2001, but that is the same story. When I opened siren the inside looked like in first post pics. So I cleened and fixed missing cooper by solderin small wires. for battery I used two packs of 3.6v in line. thats al...