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Check engine code P0446 How to fix - 1998 Buick LeSabre

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Did you just fill up the car with gas? Try taking off and putting the cap back on, making sure that it clicks numerous times. Take the car to an auto parts store that states they check codes for free and ask them to clear the code for you. If it comes back on, you may have a bad gas cap, or any number of other EVAP system failures. But most likely, you didn't get the cap on all the way.

Posted on Sep 12, 2010

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6ya6ya
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Posted on Jan 02, 2017

  • 184 Answers

SOURCE: p0446 code

Hi, check out this article, it's detailed on what to check: http://www.obd-codes.com/p0446

Posted on Mar 14, 2009

czaa
  • 4514 Answers

SOURCE: check engine light is on

you hav egr valve problems n evap emissions flaws-ull need a repair manual if ur the mech-buy one at a parts place-clymer n haynes r the best

Posted on Sep 20, 2009

motor1258
  • 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

GARYca
  • 672 Answers

SOURCE: Evaporative Emmission System Malfuction----p0446

Possible leaks, clogs, malfunctioning VSVs (vacuum switching valves), and faulty Evap charcoal canister. This system is designed to remove harmful vapors in the fuel system and preventing these vapors to enter the atmosphere, regulate fuel pressure, by sending it into the combustion chamber to be burnt.

Diagnostics for P0446:
1. Inspect vacuum hoses and pipes
between EVAP (Purge) VSV and
Charcoal Canister for leaks.
2. Replace Vapor Pressure VSV and
Canister.

Hopefully this helps

Posted on Aug 16, 2009

  • 1986 Answers

SOURCE: 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


Posted on Nov 17, 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).

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

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P0068, P0171, and P0446 and new ones down below


-I hate to say that but absolutely NO. If you don't know much about car. All these codes are emission code.
P0068 Mean Throttle position sensor.
P0171 Mean system too lean.
P0446 Mean evaporator emission control system has not correct flow
P0507 Mean Idle air control is too hight.
P0116 Mean engine coolant temperature.

Need to have a mechanic to check one by one to determine which part is effect before replace it.

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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


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