What should I check for a p0441 code

@jose15064 I am sure that by now you already researched your code P0441. This is pretty much what could be causing it:

Code P0441 Lexus Possible Causes

• Loose or missing gas cap
• Faulty Purge Vacuum Switching Valve (VSV)
• Purge Vacuum Switching Valve harness is open or shorted
• Purge Vacuum Switching Valve circuit poor electrical connection
• Faulty Canister Pump Module
• Faulty EVAP Canister
• Faulty Engine Control Module (ECM)
  
  from here

Besides all of those things, I would check on/with forums like this one that discuss just that particular code.