Check Engine Light Due to EVAP System Failure on Lexus IS300

Occasionally, the Check Engine Light is illuminated due to failures in the evaporative emission (EVAP) system. Our technicians tell us that proper diagnoses is generally required to confirm the exact fault causing the warning light to come on.

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Average mileage: 134,193 (89,123–185,000)
5 model years affected: 2001, 2002, 2003, 2004, more2005
16 people reported this problem
5 people shared problem details
2001 Lexus IS300135,000
check engine light on displaying p0440, p0446
2002 Lexus IS300120,000
I have check Engine light problems since last 11/2 years. Change sensor in Tank, gas cap, and recently changed charcoal canister. Light wasn't there for last 10 days and now same problem starts again.......
Checked system & code read EVAP System Failure (Small)
2001 Lexus IS300180,000
MIL/CEL usually comes on and pulls the same code when I am about to run out of petrol.
2001 Lexus IS300185,000
This started happening after a tune-up at a local Meineke. They basically gave up on finding the leak. I've had to play some games to pass inspection (reset ecu, complete a drive cycle, get it inspected prior to light coming back on).
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