Very unusual sound at startup

Good Morning,

Yesterday morning, my 2010 had a very strange noise happen at startup. I'll preface this by saying that it was very early in the morning and I wasn't quite 100% awake, so the exact chain of events are a little foggy to me.

It was about 65 degrees when I went to start the vehicle in the morning. I noticed it was pretty humid out and the first humid morning of the year (I live in central PA). When I hit the power button, a very loud noise came from the engine area. It sounded like metal grinding and the motor having difficulty idling. I depressed the brake to attempt to put the vehicle in drive and the yellow "!" indicator light came on with a message on the on board display (i cant remember what it said). I shut the vehicle down and after a few seconds hit the button again..... same thing. This time, the idling and "grinding-like" noise went away and then the car seemed 100% normal. I noticed there was a little bit of blue smoke coming out of the exhaust while it was idling/grinding roughly.

Perhaps not the smartest thing to do, but I left for work and the vehicle has worked 100% fine since the mishap yesterday morning. In total, I have driven about 150 miles since the issue with no problems.

I read a sticky post concerning a service bulletin for engine knocking at start-up but what i heard seemed to be more than knocking and it was well above 40 degrees.

Any ideas as to what could have caused this? I'm questioning myself whether i attempted to drive with the parking break on but I honestly cant quite remember what happened.

Thank you for any input.

 

Thanks, I am definitely going to contact my local dealer for service. I wish I could better recall what the sound was, but it seemed to be more of a "metal on metal" grinding noise.

Would the mentioned TSB also cause the blue smoke?