Originally posted by firebird45331
I checked for codes last night only codes I was getting was 1-2-1 (which I did while checking the impedance) and 2-1-2 I don't remember the second one exactly, but I knew it was concerning the automatic adjustment oxygen sensor. It's kinda nifty how volvo has it's onboard diagnostics like that.
most all cars has a onboard diagnostics like that up until 1996 when they went to the (OBD 2). now you need a scaner.