Evap System Issues
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Driver School Candidate
Joined: Mar 2017
Posts: 3
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From: MA
Evap System Issues
Long time lurker, remedial auto tinkering skills, having trouble with my new-to-me '05 ES330. A few days ago the holy trinity (CEL, etc.) popped up on the dash, and returned P0441, P0446, P0455 and P0442. No real changes to the drive - idling a bit higher but settles after a few minutes (colder here the last day or so) and is producing a faint but noticeable gas scent very inconsistently.
From what I've gathered thus far, this could be a number of things ranging from the gas cap (clean, secure) to the charcoal canister, and/or some disconnected or clogged hoses in between. I'm new to auto tinkering, so I was hoping to draw on the collective knowledge here to get a sense of where I might get the best start. Photos, diagrams, etc. are particularly appreciated.
Inching closer to bringing it in for a smoke test, but would prefer more informed/intelligent thoughts before I do so (if at all).
Thanks to all in advance!
From what I've gathered thus far, this could be a number of things ranging from the gas cap (clean, secure) to the charcoal canister, and/or some disconnected or clogged hoses in between. I'm new to auto tinkering, so I was hoping to draw on the collective knowledge here to get a sense of where I might get the best start. Photos, diagrams, etc. are particularly appreciated.
Inching closer to bringing it in for a smoke test, but would prefer more informed/intelligent thoughts before I do so (if at all).
Thanks to all in advance!
Last edited by BOSKA; Mar 10, 2017 at 10:39 AM.
Pole Position
Joined: Feb 2017
Posts: 368
Likes: 39
From: CA
Gas cap may be clean but still leak. I'd start there as it's the easiest. Of course, know what each code is to help narrow it down so you're not just throwing parts at it.
If it's not the cap, I find that Toyota EVAP problems are usually these in order from most common to least: VSV, hoses, canister.
It it's the VSV, you apply voltage to see if it clicks and test for airflow, also check short to bracket (ground) and ohm it out. Will see if I can look up the specs.
If it's a cracked hose, replace it (since you get a gas smell, I bet this is likely).
The canister would need replacement, or refilling. Some people cut it open, replace the charcoal with aquarium charcoal pellets, and glue it closed. Never tried it, myself.
If it's not the cap, I find that Toyota EVAP problems are usually these in order from most common to least: VSV, hoses, canister.
It it's the VSV, you apply voltage to see if it clicks and test for airflow, also check short to bracket (ground) and ohm it out. Will see if I can look up the specs.
If it's a cracked hose, replace it (since you get a gas smell, I bet this is likely).
The canister would need replacement, or refilling. Some people cut it open, replace the charcoal with aquarium charcoal pellets, and glue it closed. Never tried it, myself.
Thread Starter
Driver School Candidate
Joined: Mar 2017
Posts: 3
Likes: 0
From: MA
Thanks!
Gas cap may be clean but still leak. I'd start there as it's the easiest. Of course, know what each code is to help narrow it down so you're not just throwing parts at it.
If it's not the cap, I find that Toyota EVAP problems are usually these in order from most common to least: VSV, hoses, canister.
It it's the VSV, you apply voltage to see if it clicks and test for airflow, also check short to bracket (ground) and ohm it out. Will see if I can look up the specs.
If it's a cracked hose, replace it (since you get a gas smell, I bet this is likely).
The canister would need replacement, or refilling. Some people cut it open, replace the charcoal with aquarium charcoal pellets, and glue it closed. Never tried it, myself.
If it's not the cap, I find that Toyota EVAP problems are usually these in order from most common to least: VSV, hoses, canister.
It it's the VSV, you apply voltage to see if it clicks and test for airflow, also check short to bracket (ground) and ohm it out. Will see if I can look up the specs.
If it's a cracked hose, replace it (since you get a gas smell, I bet this is likely).
The canister would need replacement, or refilling. Some people cut it open, replace the charcoal with aquarium charcoal pellets, and glue it closed. Never tried it, myself.
Belated thanks, nsghtbrwry! Replaced gas cap to no avail, then replaced one of the hoses that was cracking at the connection - CEL off 25 miles later.
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