Have Toyota Questions? Ask a Mechanic for Answers ASAP
There is likely a code set in there that your garage is not able to read with their equipment. The lights mean the traction control system has seen a fault and logged a code in the computer. But many shops do not have a scanner capable of accessing that computer. It is not really dangerous to drive it, when the lights are on it means the systems are shut down so the truck will act like an older car without those safety features. You will either need to see a dealer or a well equipped independent shop and they can pull the code(s) which will point to the failed part, there are so many options on a 10 year old vehicle that any guessing would not be smart or cost effective.