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Getting p0446 code, need to see all of emission lines

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  • Cars & Trucks Master
  • 5,763 Answers

Depending on the year make and model of this car the lines are diffrent, the code you have have is a leak code, start with the gas cap, make sure it is tight and not loose, take a look at the rubber o ring on gas cap, check for cracks, a smoke machine would be a good tool here otherwise you will need to check all the lines but most of the time it is a cap or valve but with out car info it is hard to help you further

Posted on Sep 02, 2013

  • Johnny    Brown
    Johnny Brown Sep 02, 2013

    After further thinking this code is for a vent valve problem, the most likely cause is due to vent valve problem, again what year,make and model



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Posted on Jan 02, 2017


Mike Butler

  • 6674 Answers

SOURCE: check engine light on,results in code P0446-fuel emission cotrol

Well it could be as simple as a new gas cap, or clean seal on it & tighten again. There are a few other items in the system too, but one common one is the vapor canister gets plugged up with dust & dirt.

Posted on Apr 11, 2009


Mike Vincent

  • 358 Answers

SOURCE: Error codes: P0420 AND P0446

the p0420 could and usaully is a bad converter.

Posted on May 28, 2009


  • 39 Answers

SOURCE: P0440, P0441, P0446

Error code P0446 is an Evaporative Control System vent control malfunction. DTCs P0441 and P0446 are recorded by the ECM when evaporative emissions leak from the certain components, or when there is a malfunction in either the VSV for EVAP, the VSV for
pressure switching valve, or in the vapor pressure sensor itself.

Posted on Jul 02, 2009

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How to fix code p0446 on a pontiac g6

P0446 Evaporative Emission Control System Vent Control Circuit Malfunction. The code P0446 is set when the engine computer recognizes a fault or restriction at the vent control part of the Evaporative emission control system (EVAP).

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Code P0446 what does this mean

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How do i fix an error code P0446 on my 2002 kia optima? I keep clearing it off but keeps popping up. Any Ideas?

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The evaporative emission control system checks to make sure there are no leaks in the lines that run from the gas tank to the charcoal canister and up to the engine. It also checks to make sure the gas cap is sealing correctly.
It may just be that the cap was not on tight and the code was tripped.

A dusty environment can also clog the vent line and cause this code.
Have the code cleared and see if it comes back. Some auto parts stores like Auto Zone can read and clear the codes for you.
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