Hey Is300 fam! Don't rush into replacing your charcoal canister. 99% of the time P044X issues are a vacuum leak in the evap system, which is (no joke) about 40 feet of vacuum lines. Luckily, most of those lines are hard aluminum lines (e10 rated), or VERY durable nylon(?) flex lines. There are a few feet and trouble spots of SAE-30XXX rated rubber lines (various diameters depending on the connection).
Side tip -- avoid strong vacuum when testing (only use hand pumps - machine vacuums could cause damage) and never use a shop compressor to test these components (too high pressure).
Don't fork out cash for 77740-53011 Evap Canister. Do seals, gas cap, hose near foot pedals (outside if the car), near firewall.
NOTE: p0444 would be an issue with something electronic (have not seen that in person).
Негізгі бет "fergie" evap theory - is300 p0440 p0442 p0444 p0446
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