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Need help..P0446 Code

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Old Oct 19, 2020 | 12:07 AM
  #1  
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Exclamation Need help..P0446 Code

Helloo anybody reading, I have an error code on my 99 2nd Gen GS400. The code is P0446. I have a few questions I'm hoping a few of you can answer for me as I have a feeling its not JUST the EVAP system that's gone wrong but then again I'm not sure what could be wrong. which is my I'm here.

These are a few side effects that I'm not 100% sure are related to the P0446 code

1. My car has a lot of white smoke that comes out of the exhaust when starting/also when stepping on gas.
2. It has a pretty idle. the more I step on the gas the harder the car vibrates(seems to come from engine bay)
3. The only code that pops up is the P0446 twice.

the only thing I have checked is the gas cap and that is completely fine. I'd appreciate any help. I'm just trying to narrow down my problem.


Again both codes are exactly the same.
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Old Oct 19, 2020 | 07:31 AM
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Take FEELINGs out of it then fix your car...
You say you have questions but all I read are statements.
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Old Oct 19, 2020 | 07:40 AM
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Some codes take longer than others to set. I'm sure if you keep driving it others will show up, but it sound's like the head gasket is blown. White smoke, idling poor, likely heavy misfires being what you feel accelerating.
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Old Oct 21, 2020 | 09:13 AM
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  1. Check the air filter element and hoses for any major visible leaks.
  2. Check the valve cover gasket for any visible leaks of oil.
  3. Inspect and clean out your MAF (mass air flow) sensor.
  4. Check the TB (throttle body) and clean thoroughly.
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