Lexus Troubleshooting Questions? Ask a Lexus Expert
Hello and welcome to just answer.I value your input to my questions so I may help you better.Your vehicle does an automatic self check on the EVAP system and if you lefy the filler cap loose or off it would detect a gross leak and set codes for that, in doing so it will disable trac abs so to correctly solve that you need to tighten cap and cancel any codes then it will return to normal. Then it will need time for the system to go through a leaning period to reset all internal reediness readings. Hope this helps you understand how the system works .If you need further help let me know.