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Advice for P0440 P0441 P0446

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Old 09-21-17, 06:58 PM
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tyson rust
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Default Advice for P0440 P0441 P0446
i have a 2001 Gs300 245k miles. i have a check engine issue when i check it 2 problems arise i want some advice , the computer said charcoal canister filter, which is a 500 part or could it be idle air control motor? reading said two different things please advise
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Old 09-21-17, 07:37 PM
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Whats the code?

Most likely its the purge valve, a $20 part on ebay. The canister rarely goes out, its the valve that is exposed to the elements to where it gets stuck open or closed.
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Old 09-22-17, 07:50 PM
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idle air control it also said disfunction or intermittent if that makes sense?
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Old 09-22-17, 07:52 PM
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Originally Posted by Mr Jokster
Whats the code?

Most likely its the purge valve, a $20 part on ebay. The canister rarely goes out, its the valve that is exposed to the elements to where it gets stuck open or closed.

it read idle air control &also misfunction or Intermittent hope that makes sense?
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Old 09-23-17, 12:11 AM
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Whats the code please!
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Old 09-23-17, 08:53 AM
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Sounds like the Idle Air Control Valve (P0505)...the charcoal canister code pops up a lot many times could be something as simple as your gas cap. Dealer wanted $800 to replace my charcoal canister (for the second time) and I just waited and the code went away.
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Old 09-26-17, 10:09 AM
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ok sorry for the delay the code read p440 p441 p446
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Old 09-26-17, 11:59 AM
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Yep, sound like your purge valve...also look around for cracked vacuum hoses.
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Old 09-27-17, 02:30 PM
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there are a couple of valves which one in particular?

there are the following pcv valve

there is a ego vacuum solenoid valve

vapor canister purge valve
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Old 10-07-17, 10:14 AM
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Did you solve the issues?
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Old 10-11-17, 10:37 AM
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would gas cap fix the problem?
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Old 10-15-17, 08:05 PM
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Originally Posted by tyson rust
ok sorry for the delay the code read p440 p441 p446
P0441, P0446 here. Based on this thread, I think I'll try the Purge valve.
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Old 05-13-18, 09:10 AM
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Default P0441 & P0446 on 1999 Lexus GS400
Originally Posted by MDMXLX
P0441, P0446 here. Based on this thread, I think I'll try the Purge valve.
Same here...I also get...
- P0441 - Evaporative Emission Control System Incorrect Purge Flow
- P0446* [Pending] - Evaporative Emission Control System Vent Control Circuit Malfunction

My 1999 Lexus GS400 will get a new purge valve (90910-12109, vacuum switching valve).
Thanks to ALL for the thread.

BTW, I tried to contact CL via https://www.clublexus.com/contact-us/
regarding the ugly printout via Ctrl+P but get the message...
"Failed to send your message. Please try later or contact the administrator by another method."

Any improvements to Print & Contact Us features would be much appreciated.
Thanks to CL for this awesome website.
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Old 08-05-18, 12:55 PM
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Originally Posted by YLK
Same here...I also get...
- P0441 - Evaporative Emission Control System Incorrect Purge Flow
- P0446* [Pending] - Evaporative Emission Control System Vent Control Circuit Malfunction

My 1999 Lexus GS400 will get a new purge valve (90910-12109, vacuum switching valve).
Thanks to ALL for the thread.

BTW, I tried to contact CL via https://www.clublexus.com/contact-us/
regarding the ugly printout via Ctrl+P but get the message...
"Failed to send your message. Please try later or contact the administrator by another method."

Any improvements to Print & Contact Us features would be much appreciated.
Thanks to CL for this awesome website.
Did the purge valve solve your problem?
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Old 08-05-18, 01:29 PM
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Had the same codes, found out it was the rollover valve on top of the fuel tank.
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