my is300 transmission lights keep flashing constantly even though it changes smoothly
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2001 Lexus IS300 Question: transmission lights keep flashing
Answer #1patrick mannion from Greg Solow's Engine Room, March 13, 2009, 11:55Master
Check the transmission fluid level. If the transmission light is flashing the car's computer sees a fault with the transmission or transmission controls. You will need a scan tool to retrieve codes stored in the computer to determine the fault.
These transmissions don't give a lot of problems in my experience.