I have a 1999 Lexus ES300 with 146k miles and just the other day the VSC and VSC off lights lit up while I was driving...Then a few miles later the Check Engine Light came on. I scanned the codes and got P0446. My mechanic said it will be the Vacuum Switching Valve on the Canister part number 2586062010 but he says its a 2.8hour job. I read elsewhere it should only take 20minutes.... Can someone clarify? Does the car need to be lifted to do this? Also is this the right diagnosis and will this clear the VSC and VSC off lights coming on as well? Becuase when I cleared the check engine code those lights went off as well.
