Is the evaporation emission system covered by RepairPal?

The evaporative emissions system tackles fuel vapors so they are not emitted to the atmosphere. I'm not sure what you mean about this being "covered by RepairPal"? Our Q&A forum here is a great place to ask about concerns and get answers from some experts in the field. However, for your particular concern, nothing is going to be able to take the place of a hands on diagnostic test procedure being carried out by a skilled technician near you. Here are some shops you can refer to: https://repairpal.com/repair-shops/lexus-repair-and-service-in-bonita-california