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Trouble code 455

Discussion in 'Chevy Trucks' started by QuadRacer041, Oct 27, 2010.

  1. QuadRacer041

    QuadRacer041 Senior Member
    Messages: 140

    I have an 06 2500hd crew cab. My truck has been throughing a code 455; large leak in evap system. The info center on the dash tells me to tighten fuel cap I had this problem back in the spring. Put a new cap on and I got the code once more after that then it stopped. Now for like the past month or so it has been doing it again. I wonder if it has something to do with the colder weather. I any case does anyone have any ideas on what it can be? Or where to start looking?
     
  2. B&B

    B&B PlowSite Fanatic
    Messages: 12,777

    Search "EVAP" here, there's several thread on what the issue is caused by; which is a defective vent solenoid 99% of the time.
     
  3. QuadRacer041

    QuadRacer041 Senior Member
    Messages: 140

    I did a search but cant seem to find where that canister solonoid is located on the vehicle?
     
  4. 496 BB

    496 BB Senior Member
    Messages: 789

    #02-06-04-037F: DTC P0446 (Restricted/Blocked EVAP Vent Path) Set, Check Engine Light On (Replace Evaporative Emission (EVAP) Vent Valve Solenoid Assembly and Add/Relocate Filter Box Using Service Kit) - (Aug 5, 2009)


    Subject: DTC P0446 (Restricted/Blocked EVAP Vent Path) Set, Check Engine Light On (Replace Evaporative Emission (EVAP) Vent Valve Solenoid Assembly and Add/Relocate Filter Box Using Service Kit)


    Models: 1999-2007 Chevrolet Silverado (Classic) Models

    1999-2007 GMC Sierra (Classic) Models

    2007-2009 Chevrolet Silverado Models (Excluding Hybrid)

    2007-2009 GMC Sierra Models (Excluding Hybrid)




    --------------------------------------------------------------------------------

    This bulletin is being revised to add an important statement to not replace the EVAP canister. Please discard Corporate Bulletin Number 02-06-04-037E (Section 06 -- Engine/Propulsion System).


    --------------------------------------------------------------------------------

    Condition
    Some customers whose vehicles are operated in dusty type environments, such as farming or mining off-road type applications, may comment about the illumination of the check engine light, with a DTC of P0446 (Restricted/Blocked EVAP Vent Path) being set.

    Cause
    Dirt and dust intrusion into the EVAP canister vent hose assembly, resulting in restricted air flow, may cause this condition.

    Correction (1999-2007 Classic/Old Style Models)
    After following the published SI diagnostics for P0446 and determining that the EVAP canister vent valve is the cause of the MIL light, replace the existing EVAP canister vent valve assembly with a new assembly. This new assembly is a sealed unit that is designed to be vented through a remote filter box. To ensure correct installation, follow the procedures below.

    Important: DO NOT replace the EVAP canister assembly for this concern unless it fails the leak test.

    1999-2003 Model Year (Use Service Kit P/N 19207762)
    Raise the vehicle. Suitably support the vehicle.
    Disconnect the EVAP canister vent valve electrical connector, if equipped.
    Disengage the two vent valve pipe clips securing the pipe to the underbody. Remove the clips from the underbody and discard.
    Disconnect the vent valve pipe at the EVAP canister.
    Remove and retain the EVAP canister vent valve bracket mounting bolt.
    Remove the complete EVAP canister vent valve assembly with bracket attached and discard.



    Important: The new canister vent valve will be installed in a new location, outside of the frame.

    Position and secure the new valve assembly to the frame bracket on the outside of the frame using the existing hole and mounting bolt.
    Tighten
    Tighten the bracket mounting bolt to 12 N·m (106 lb in).

    Connect the vent valve pipe to the EVAP canister.
    Install the two vent valve pipe clips into the existing underbody holes.
    Connect the EVAP canister vent valve electrical connector, if equipped.
    Attach bulk 5/8" heater hose to the vent valve port and secure using a clamp. Run a length as needed along the frame rail routing to the area above the transmission.
    Cut the hose to determined length and install the supplied filter box. Secure using a clamp.
    Remove the transmission support and lower the transmission assembly as necessary to allow for access to the new filter box location.



    Secure the filter box to the transmission vent hose just forward of the hose tee-section using a tie strap. DO NOT pinch or restrict the transmission vent hose. The filter box opening should be pointing downward.
    Raise the transmission and reinstall the transmission support.
    Tie strap the hose as needed along the frame rail in order to keep the hose away from pinch-points and heat sources.
    Lower the vehicle.
    2004-2007 Model Year (Use Service Kit P/N 19152349)
    Raise the vehicle. Suitably support the vehicle.
    Disconnect the EVAP canister vent valve electrical connector.
    Disconnect the canister pipe from the vent valve.
    Push in the retainer and remove the existing canister vent valve from the fuel tank clip or mounting bracket. Discard the old valve.
    Cut back the existing canister pipe approximately 51 mm (2 in) to remove the quick connect end.

    Install the new canister vent valve to the fuel tank clip or mounting bracket.
    Cut bulk 5/8" heater hose to a length of approximately 76 mm (3 in). Install the hose between the vent valve and the canister pipe and secure using clamps.
    Attach bulk 5/8" heater hose to the vent valve port and secure using a clamp. Run a length as needed along the frame rail routing to the area above the transmission.
    Cut the hose to determined length and install the supplied filter box. Secure using a clamp.
    Remove the transmission support and lower the transmission assembly as necessary to allow for access to the new filter box location.

    Secure the filter box to the transmission vent hose just forward of the hose tee-section using a tie strap. DO NOT pinch or restrict the transmission vent hose. The filter box opening should be pointing downward.
    Raise the transmission and reinstall the transmission support.
    Connect the EVAP canister vent valve electrical connector.
    Tie strap the hose as needed along the frame rail in order to keep the hose away from pinch-points and heat sources.
    Lower the vehicle.
    Correction (2007-2009 New Style Models)
    After following the published SI diagnostics for P0446 and determining that the EVAP canister vent valve is the cause of the MIL light, replace the EVAP canister vent valve assembly and relocate the remote filter box. To ensure correct installation, follow the procedures below.

    Important: DO NOT replace the EVAP canister assembly for this concern unless it fails the leak test.

    Use Service Kit P/N 19207763
    Raise the vehicle. Suitably support the vehicle.
    Disconnect the EVAP canister vent valve electrical connector.
    Disconnect the vent valve pipe quick connect from the canister.
    Either cut the existing valve vent pipe and leave the remaining section of pipe in the vehicle or remove along with the valve.
    Push in the retainer and remove the existing canister vent valve from the fuel tank clip or mounting bracket.
    Cut back the existing canister pipe approximately 51 mm (2 in) and retain the pipe for use with new valve.
    Connect the canister pipe quick connect to the canister.

    Install the new canister vent valve to the fuel tank clip or mounting bracket.
    Cut bulk 5/8" heater hose to a length of approximately 76 mm (3 in). Install the hose between the vent valve and the canister pipe and secure using clamps.
    Attach bulk 5/8" heater hose to the vent valve port and secure using a clamp. Run a length as needed along the frame rail routing to the passenger side area above the transmission.
    Cut the hose to determined length and install the supplied filter box. Secure using a clamp.
    Remove the transmission heat shield, if necessary.
    Remove the transmission support and lower the transmission assembly as necessary to allow for access to the new filter box location.


    Secure the filter box to the transmission vent hose just forward of the hose tee-section using a tie strap. DO NOT pinch or restrict the transmission vent hose. The filter box opening should be pointing downward.
    Raise the transmission and reinstall the transmission support.
    Reinstall the transmission heat shield.
    Connect the EVAP canister vent valve electrical connector.
    Tie strap the hose as needed along the frame rail in order to keep the hose away from pinch-points and heat sources.
    Lower the vehicle.
    Parts Information
    Part Number
    Description
    Qty
    Material Allowance

    19207762 (1999-2003 Model Year)
    Solenoid Kit, EVAP Emission Canister Vent Valve
    1
    --

    19207763 (2004-2009 Model Year)
    Solenoid Kit, EVAP Emission Canister Vent Valve
    1
    --

    9438383 (5/8" X 25' roll)
    Hose
    Cut to Length
    $10.80 USD ($22.59 CAD)

    12337820 (10 per pack)
    Tie-Strap
    5
    $3.80 USD ($4.55 CAD)

    11609970 (10 per pack)
    Clamp
    2 (1999-2003)

    or

    4 (2004-2008)
    $3.78 USD ($7.08 CAD) (1999-2003)

    or

    $7.56 USD ($14.17 CAD) (2004-2008)


    Put unused material on shelf for future use.

    Warranty Information
    For vehicles repaired under warranty, use:

    Labor Operation
    Description
    Labor Time

    J7908*
    Replace Evaporative Emission (EVAP) Vent Valve Solenoid Assembly and Add/Relocate Filter Box Using Service Kit
    1.1 hrs**

    * This is a unique labor operation for bulletin use only. It will not be published in the Labor Time Guide.

    **Diagnosis time is included in this labor time.



    OK I want someone to check this out. I have heard that for 04+ Silverados this replacement part is over $100. I have also heard that using an 06 Suburban part (same thing) is only $30 or so. Ive even heard an 06 Aveo will work. Take the part out and goto your Chevy dealer and ask to see either one of those and compare. If it works a helluva a lot cheaper.

    Anyways heres what you need. http://ww2.justanswer.com/uploads/Bluegorilla/2009-01-26_195324_EVAP_reroute.pdf
     
  5. QuadRacer041

    QuadRacer041 Senior Member
    Messages: 140

    Does the old solenoid look totally differnt then the replacement? From looking at pictures what I have under my truck look different. I only see one thing that has a hareness that plugs into it. Its round, about the size of a ver small coffee cup and its mounted on the back of the fuel tank. Could that be it?
     
  6. B&B

    B&B PlowSite Fanatic
    Messages: 12,777

    Posted the entire bulletin Chris? :laughing:


    Yes that's it. The new one will look differently in that it will have an extra hose port to add a second hose to for remote inlet relocation to prevent the same issue from happening again. Physical size is a little different too.
     
  7. QuadRacer041

    QuadRacer041 Senior Member
    Messages: 140

    Got the new one and repaced it today, very easy. Cleared the codes now I just have to wait untill it runs the test again to make sure it was fixed.
     
  8. 496 BB

    496 BB Senior Member
    Messages: 789

    This way there is no confusion :D