pressure washed

I have a 2006 Corolla i pressure washed the engine to clean it up and deatail it, Now it run's about 150 under base idle and the check engine light came on .I have to take an important trip in the next few day's and i don't know what to do and basically don't have the money to take to a shop for them to charge me $50 or 60 per hr .Mite anyone have an idea what it could be. thank you.
Sounds like you may have gotten water in a connector or sensor. Take it to Advanced Auto or Autozone and get codes read (if you don't have a reader). That will steer you to the next step.