Okay, so I'm very new, so if this is posted in the wrong section or I just didn't research enough I apologize.
I own a 2012 Cruze LT 1.4L Turbo, with about 85,000 miles on the engine..
I went for a drive tonight, on the freeway, and after about 5 or so minutes I noticed a loss of power going uphill at about 65 mph, it started out as a small loss. after about 5 more minutes, I noticed a significant loss of power at any speed and a constant whining sound when gas was applied. starting in the higher gears, then eventually making the sound any time I would accelerate. concerned, I turned around to head home, and took it easy, trying to avoid too much acceleration in order to prevent the sound anymore. total trip so far is about 10 miles. Once I got off the freeway, the whining sound continued, couped with an intermittent sound that resembled the sound of air getting sucked into the intake when you stab the gas, however I was avoiding the gas pedal at all costs. I also noticed that any time I was at a complete stop, the idle was very jumpy, like a heartbeat. Once I made it home, I noticed my CEL was lit, and a very small amount of smoke was coming from under the hood (I'm colorblind, so I have no idea what color it was, unfortunately.) before I killed the engine, I listened to the idle very quickly and noticed the sound of a possible vacuum leak, a large one. I killed the engine, and popped the hood, couldn't see anything obvious, but it was dark. I have a Zubie Key, that monitors my cars OBD system, and pulled code P0299. Turbocharger/Supercharger "A" underboost condition. So I guess, before I take the car in, is there anything I should know, or that I can do to diagnose this problem? Money is a very precious resource, so if I can save anything, I will. Please help me out here, as I am only handy with basic car issues.