I just purchase a 2007 Lexus IS250 with 150k mil. I did a transmission service when I got the car because it had the same issue VSC light traction, check engine, exclamation light on. Reading through forums and other youtube videos,everyone suggested to replace TOYOTA PART N. 35290-34010 Solenoid assy.line pressure. After the service was done, I removed the ground cable from the battery to eliminate the codes,witch it did, but after driving the car for about an hour to my surprise the codes were back on the dash, I took the car back to the mechanic and the following error codes came up. P0761 Shift Solenoid C Stuck or Off -P2714 Pressure Control Solenoid D stuck or off. P2757 Torque Converter Clutch Pressure Control Solenoid Control Circuit Performance stuck or off. The unique situation with my car is that all my gears shift smoothly with no further issues. At this point I have taken the car to a transmission mechanic and show him the codes and right away ID the problem through his years of experience he claimed that the issue is the Valve body, that needs to be replaced. According to the mechanic, TOYOTA has poorly managed the service requirements for customers to maintain their vehicles, it's highly recommended to drain out the trans and replace the oil filter every 80k mil. because parts and other components inside this cars are not manufacture as they use too causing problems for the consumers. Through my experience when the transmission fluid was drain the fluid was super dark and had a burning smell to it, so this tells you that the previous owners did a poor job maintain the service logs on this vehicle.
I have schedule my service visit this week, so i will update everyone on the forum of the service once is done, i hope the mechanic is right and resolves my problem!
