ReducedPower light comes on at random. Slows car from highway speed to 40-45 MPH

Thanks for getting back to me. I appreciate your insight. So, what would you guess be the problem? The fuel pump or sensor? Are you here in Tulsa?

I'm sorry to say there's no guessing on this code. Your dealing with a direct injection fuel system, to make that a little more understandable, a normal fuel injection system operates on a PSI of 35 to 55 depending on the fuel system needs. This high pressure system operates on 5 - 10 MPa (725. to 1450. PSI) because it injects fuel into the combustion chamber as the piston is creating maximum amount of pressure for the best combustion. Instead of a normal system that takes fuel into the intake manifold at almost no pressure with the air long before the compression cycle starts. That high pressure makes testing the fuel pressure not feasible. So your forced to use the readings from the PCM as it acquiring from the fuel sensor regulator which can be misleading making the testing harder. To troubleshoot this system take a driveability tech with a Tech 2 scanner (factory) and a good knowledge of electrical work. The manufacturer has a 35 step test process for this code which is exceptionally long and in the end it states if the problem is not found to replace PCM with a know good PCM, reprogram and retest. Adding to the testing is the fact the code is set only on the second incident and makes it much harder to track down unless it's happening almost every drive cycle. If the testing was to get's to this point you could be in for more than $1000. to $2000. for repairs. I would hope it to be an electrical short or a mechanical part wore out making it a much quicker repair. Yes I do owe a shop in Tulsa and Owasso. I myself run my Owasso shop, I'm a ASE Master Tech and do this kind of work and have the Tech 2 scanner but sorry to say I'm booked until the end of the month, for a quicker repair the dealer should be able to get to it this week. If not call me, Tim 918-371-1412. Also if you get it into the dealer and something doesn't sound right about their suggested repair work give me a call an I could give you some guidance.