I have the same problem with my 2008 Rx400h. Took it to the Lexus dealer in Kingsport, Tennessee and they claim it's a defect in the "gutter" drainage design and that water gets into the hybrid system, hence the "Engine Check" light displays check hybid system.
We contacted Lexus headquarters in the US and they responded with it's "not anything we can do about it", basically saying tough luck! This is a dangerous and potentially catastrophic situation if the vehicle dies suddently on a freeway putting passengers in peril. I cannot in all honesty sell the car as it is, but I can't spend $8,000 to repair it as they estimated.
My husband is an attorney in Florida and is willing to open a class action suit against Lexus to get them to repair or replace all defective vehicles and NOT put people's lives at risk each and every time they get into their vehicles. If anyone is having a similar situation, you can call his office at 954-764-7600 ext 303 and perhaps together we can put pressure on Lexus to own up to this horrific defect by doing the right thing for their Lexus car owners before one of us ends up in the morgue!
