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What is a code p0446 in the check engine - Computers & Internet

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P0446 Evaporative Emission Control System Vent Control malfunction.
The gas cannister vent is faulty, you will have to replace it whole.

Posted on Oct 02, 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

1 Answer

I GOT A 1998 SILVERADO 4X4 ENGINE LIGHT ON CODE P0446


Well code 446 is for a problem with the EVAP system which vents fumes from the gas tank to the vapor canister.
You would need to check the system using a test chart for that code.
You can look online for the test procedure and the equipment required.

Feb 03, 2014 | 1998 Chevrolet Chevrolet silverado

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P0446 emision contrl code


code P0446 is for a Evaporative Emission (EVAP) Vent System Performance. this can be aused by a wiring problem, a engine control module, but in most cases this is caused by a EVAP canister vent solenoid. to correctly check this code out, requires a scan tool and a smoke machine

Jun 07, 2011 | Chevrolet Colorado Cars & Trucks

1 Answer

Check engine code "P0446 Evap Control System Vent Control Circ"


Unfortunately, this code has nothing to do with the gas cap....
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
Here are some things you could try to fix it:
  • Replace Vent valve
  • Repair open, short, or resistance problem in control circuit
  • Repair open, or short, or resistance problem in power circuit
  • Replace PCM


Nov 17, 2009 | 2002 Toyota Corolla

3 Answers

2001 Avalon Check engine codes P0440,p0441 and p0446.


yes it would be a smart thing to do and no it is not that hard it should onlt have two bolts holding it on

Aug 03, 2009 | 2001 Toyota Corolla

1 Answer

Code p0446 1997 nissan maxima


how did you fix your p0446 code?

Apr 21, 2009 | 1997 Nissan Maxima

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