The Check Engine Light may illuminate with various EVAP system fault codes stored. Our technicians tell us this may be caused by a sticking EVAP Purge Vacuum Switching valve. An improved valve is now available to remedy this problem.Google+
Car Problem Reports
Lexus RX330 Check Engine Light With Codes P0440, P0441, P0442, or P0446
Lexus RX330 Problem
Model Year Affected: 2004
Average Mileage: 138,500 mi (135,000 mi - 142,000 mi)
Visitor, 2004 Lexus RX330, 135,000 mi
Same codes....told it might be the valve vacuum switch.
Have all these codes on this same vehicle. Have checked all the usual but so far not finding the issue.