Wow believe it or not I just had the same issue today.
Super hot and stuffy weather, I went for spirited driving + hwy and all was fine. Then I parked the car outside under shades and had lunch for about an hour. Everything was normal up to this point. Then as I was leaving going uphill, I came to the first left sweeper, turned my steering wheel and immediately felt something was not right: NO POWER! The car didn‘t stall or anything, just zero throttle response. Extremely dangerous and nerve wrecking indeed. Shut it off and started it still no throttle. Repeated that 3-4 times and finally I got power back. No CEL light or any tell-tale, dash was normal.
2-3 km later it happened again at a roundabout while I was in the middle of it! This time power came back on after 2-3 secs… scary sh*t. Still no CEL or any tell-tale.
After another 30-40km drive home, it did it again as I was at the top of a hill intersection with the steering wheel turned, no power! After holding up traffic for 2-3 mins I had to roll down the hill 20-30 meters so I could let the traffic go. After shutting it down and restarting for 4-5 times it finally worked. I made it home and the TC light came on.
I will be pulling the code ASAP to see what’s up. Finger crossed…