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P0446 code what is this? how can it be fix? - 2003 Chevrolet Suburban 1500

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A code P0446 could mean one or more of the following has happened:

  • Faulty vent valve
  • Open, short or excessive resistance on Vent valve control circuit
  • Blockage of vent valve
  • Bad PCM

Posted on Sep 08, 2010

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Posted on Jan 02, 2017

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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).

https://www.obd-codes.com/p0446

Jan 25, 2017 | Pontiac Cars & Trucks

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Got code p0446 on my grand am what is it


Evaporative Emission Control System Vent Control Circuit Malfunction

the following links can assist you with problem
https://www.obd-codes.com/p0446 P0446 OBD II Trouble Code p0446 Yahoo Video Search Results

Sep 29, 2016 | Cars & Trucks

1 Answer

My 06 cobalt has these codes can anyone tell me what they mean? Are they an expensive fix? p0446,p0455, p0172


code p0446 refers to evaporative emission (EVAP) system-vent control-circuit malfunction===causes --wiring--EVAP canister purge valve--ECM
code p0455 refers to EVAP system-large leak detected===causes --hose connections--intake leak--EVAP canister---EVap canister purge valve
code p0172 refers to system too rich, bank 1===causes intake blocked---EVAP canister purge valve--fuel pressure ---EGR system---injector/s ---ECM
because the EVAP purge valve appears in all codes I would be inclined to change that unit first the run the fault codes again

Jul 23, 2015 | 2006 Chevrolet Chevrolet Cobalt LT

1 Answer

How to fix code P0446 on chevy uplander 2006?


icon1.png Quick fix for code p0446 evap emissions vent circuit low.
As the title says: some might have an ses p0446, evap emissions vent circuit low. If you take it to the dealer they want 300-400.00 to fix the problem. GM has a service bulletin on this condition and have the updated part for 180.00, thats suppose to eliminate this issue.
Basically the problem is, the evap purge vent valve gets clogged with dirt, especially if the truck is used in dirty conditions. Well I figured there had to be a cheaper way to cure this problem.
Here it is:
1) find the location of the vent valve; its under the truck, locate the charcoal canister on the front of the gas tank and trace the vent line to the vent valve.
2) Take the bracket loose with a 5/8 wrench.
3) Spin the valve around so the side with the hole is facing you.
4) Take an air compressor and blow the vent valve out.
5) reinstall and clear the code and it's fixed.

Now I know the updated part from gm is supposed to keep the valve from clogging ever again, but why spend the money when all you have to do is blow out the vent valve every 50k-100kmi and save your $$$!

Jul 18, 2014 | 2006 Chevrolet Uplander

1 Answer

Code po446


purge solenoid code p0446 eazy fix

Sep 30, 2012 | 2003 Chevrolet Silverado 1500

1 Answer

Service engine light is on reading code p0446 for 2003 chevrolet impala pictures on how to fix


A code P0446 could mean one or more of the following has happened:

  • Faulty vent valve
  • Open, short or excessive resistance on Vent valve control circuit
  • Blockage of vent valve
  • Bad PCM
  • use maxiscan us703 clear the fault codes.

May 21, 2012 | Chevrolet Impala Cars & Trucks

1 Answer

Fails emissions with fault code p0446.. how do i fix this?


P0446....Evaporative Emission Control System Vent Control Circuit

this vehicle should not have failed with this code ,its a rubber pipe perished or split ,short answer ice road truckers is back on after adverts sorry

Mar 04, 2011 | 2006 Kia Rio5

2 Answers

P0440, P0441, P0446


where is Evap Emission Control System Purge Flow fault

Jul 02, 2009 | 2000 Toyota Celica

1 Answer

Code p0446 1997 nissan maxima


how did you fix your p0446 code?

Apr 21, 2009 | 1997 Nissan Maxima

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