Have Toyota Questions? Ask a Mechanic for Answers ASAP
Hello, my name is ***** ***** I am a professional here at Just Answer. I have noticed that your question was not getting a response and thought I would see if you still need help with this.I apologize for the delay and I hope I can still assist you with this here.The Master warning light comes on when the system sees a system fault and when this happens the computer should set and store a fault code and or codes. The dealer should have been able to scan the system and retrieve the fault code as well. They are going to need to keep the car till the light comes back on so they can pull the fault code and or codes. I would consider leaving it with them till they can come up with a cause. You can continue to drive the car but at some point it could leave you stranded.