I just watched a video where the VVT solenoid was causing brakes to not work intermittently. My 99 rx300 is doing the same thing. I did get a VVT bank 2 code and some misfires on 2,4,6.
Initially, I was only getting a Air Fuel Ratio code on bank 1, just replaced it, but not bank 2. I figure Ill do bank 2 Air Fuel Ratio sensor and both the VVT solenoids.
REALLY hope this fixes it.
Great info on this forum.