what is a po446 code on a toyota sequoia
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2001 Toyota Sequoia Question: po446
Answer #1volvo850 from Auto Tech LTD, April 29, 2011, 20:15Technician
Evaporative Emmission control system vent control system malfunction,
Either the gas cap is leaking, or the tank has a vacuum leak within the emmission system, I would have the system smoke tested by a competant emissions shop.