Detail: ETS light is on on my 1999 S70 GLT - 1999 Volvo S70
Solution: The ETS is the "elecronic throttle system". You either need to get a software upgrade for it, most of the time it wont take. More than likely you will have to replace the throttle body. I would bring it to the dealer. Unless you have VADIS there is nothing you can do. VADIS is what the onboard diagnostic computers the dealerships have for diagnosing your car. , Hi, a 6ya Mechanic can help you resolve that issue over the phone in a minute or two. Best thing about this new service is that you are never placed on hold and get to talk to real repair professionals here in the US. click here to Talk to a Mechanic (only for users in the US for now) and get all the help you need. Goodluck!