Did you get an intake for your car? And if you did didyou take out the air mass flow sensor. It 's in the intake. If you got this done to your car this is what is causing it. Your sensor might be damaged thats why it's doing that. You need to put back all the original parts back in and bring ti back to the dealer. So you can be covered under warranty. Tell them it just started happening out of no where. he he