hmmmm, i just got that code the other weekend.
it was cold out and i started the car up to warm and it was idling really low, nearly stalling, kept reving to keep the rpms, from dropping to near zero, then the cel pops up.
had it checked out last friday after thanksgiving and found out that code. shop that checked out my car said it should be covered by toyota, something like repairs of ecu and injectors.
stopped by toyota afterwards and they said they'd have to check it out themselves. unfortunately i had to cancel my monday appointment due to having a car up on my Hood
friday evening and now my freaking car is in a repair shop now.