Just came back from my dealer. My 2006 400h (about 21,800 miles) started flashing the "check VSC system/check hybrid system" on Monday. Noted that the engine didn't shut off as usual at a traffic stop and getting out of the intersection was sluggish and going uphill was a bear; the CVT kept shifting. The hybrid battery reading was down to the last bar (when usually it's at about 2/3). From the time late Monday until today when I got to the dealer the MPG tanked from 26 to 22. I suspect it was running on gas the entire time.
The dealer said the hybrid battery "failed" and I'm waiting for parts and getting it fixed, hopefully by Monday.
In the meantime, there weren't any Lexus loaners available so I'm tooling around town in a Chevy Cobalt with manual locks, windows, mirrors, etc. (careful not to lock myself out of the car!) <_<