Question about Chevrolet Avalanche

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Check engine code po446,also can only put gas in very slowly or gas will gush out of filler pipe.don't know if both are related.

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Yes, 446 is fuel EVAP system vent valve circuit malfunction. Check the connection to the vent valve. If connection is good, valve/solenoid may have failed. The vent valve is between the EVAP charcoal cannister and the engine along the vacuum line. If you can tell me your model and year, I may be able to give you more specific insrtuctions.

Posted on Nov 13, 2010

  • 1 more comment 
  • jandmcanfiel Nov 13, 2010

    2005 avalanche 1500.5.3ltr z71

  • Jeffrey Turcotte
    Jeffrey Turcotte Nov 13, 2010

    your vent valve sits on the intake manifold as shown below. Pull the connector off and check for bent or broken pins.

    If you want to test the solenoid, I recommend you look up any test procedures in a manual for your car. I think you can get the part for 30 some dollars. If you have more questions, please let me know.

  • jandmcanfiel Nov 13, 2010

    thanks will try today



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My car is a 2000 Honda accord, engine light came on checked gas cap,it was ok,shop checked it with machine and code P 1457 came up.What does it mean, & and how do i fix it?

P1457 90 EVAP Emission Control System Leak Detected (Control Canister System) Possible causes
- Missing Fuel cap
- Incorrect fuel filler cap used
- Fuel filler cap remains open or fails to close
- Foreign matter caught in fuel filler cap
It means that your fuel tank isn't airtight. It could be a crack in the filler pipe, a loose hose or even a blown gasket at the fuel gauge sender.
Your car does a vacuum check on the fuel system now and then. If it detects it's not air tight, it throws a code. Now, the gas capis the most common thing. But from the fuel filter to the filler neck something is not right. Look for a small gas leak, stick your head under the car and give it a whiff. see if you smell it, if you have a garage put sheets of news paper under your car over night and see if any leeks drip on it. There's other things but try those first.

May 31, 2014 | 2000 Honda Accord

1 Answer

Emission control

that code has nothing to do with your a/c unit. its saying you have an evap leak somewhere. make sure you check your fuel cap, fuel lines and all vacuum hoses on the engine. also check your fuel filler neck for and pin holes. if you cant find anything, go and get a smoke test done to find the exact problem

Aug 25, 2013 | 1999 Chevrolet Astro

3 Answers


Fluid Level Checking & Filling To Check:
  1. Connect a scan tool to the vehicle to read ATF temperature. ATF checking temperature should be 95° - 113°F (35° - 45°C).
  2. Start the engine.
  3. Raise and safely support the vehicle.
  4. Place a drain pan under the transmission.
  5. Allow the ATF temperature to reach 95° - 113°F (35° - 45°C). Automatic transmission fluid inspection plug vw-07-00-7273.gif

  6. Remove the inspection plug from the transmission housing. Fluid is pipe will run out. If fluid continues to drip out, no additional fluid is needed. If only the fluid in the overflow pipe runs out, additional fluid is needed.
To Fill:
Automatic transmission fluid filler pipe vw-07-00-7274.gif

  1. Pry the cap from the filler pipe. The cap locking device will be destroyed during removal.
  2. Pull the plug from the filler pipe.
  3. Add fluid slowly with VAG 1924 or equivalent until fluid runs out of the inspection hole. Install the inspection hole plug.
  4. Install the plug in the filler pipe and secure with a new cap.
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Aug 17, 2010 | 2003 Volkswagen Jetta TDI

3 Answers

Toyota seinna po440, po441, po446

you have to understand that there is a leak in the system other than the gas cap for the evaporative system. The system needs to be professionally closed, and smoke introduced into to find the leak, and a through component check, eg.. purge valve vapor canister vent solenoid all functioning correctly

Jun 17, 2009 | 1998 Toyota Camry

1 Answer

Gas gushes out when I pump gas into my Ford Freestar.

slow filler ,its most likely had a lump of wire wool pushed into filler pipe to stop anyone syphoning the gas

Nov 18, 2008 | 2005 Ford Freestar

3 Answers

I got a problem with my toyota camry 1998

More often than not, the Vacuum Switching Valve for the EVAP has failed. This is assuming that alll of the vacuum lines are good, and there is no damage or cracks in any of the moulded plastic connectors under the tank. You need to go to a Toyota dealer & purchase the Evap VSV, part number 90910-12264; expect to pay about 50 dollars for the switch. You can't buy this switch at an auto retailer such as AutoZone; it's a dealer item only. Hope this helps, and the graciousness of a "FixYa" would be much appreciated. Thnaks for choosing FixYa!

Oct 23, 2008 | 2002 Toyota Camry

2 Answers

Diagnostic codes for 2003 kia sorento

P0431 :- (warm up catalytic converter bank 2 - efficiency below threshold )
test the catalytic converter it locate in exhaust gas pipe
test the heated oxygen sensor in exhaust gas pipe too near the engine
P0446 :- (evaporative emission (EVAP) system , vent control , circuit malfunction )
test wiring , EVAP canister purge valve , ECM engine control module
just ask for more abut DTC

Jun 18, 2008 | 2003 Kia Sorento

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