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  1. #1

    Default P0446 EVAP Code (check engine light)

    Check for SES Light on P0446 EVAP Code check EVAP Valves both working check Vent Calve Found it is covered in mud and has dust intrusion also canister recommend canister and vent valve plus relocate
    Got that on my recipect from the dealership from my check engine light. Anyone have any suggestions on what to do? I didn't want to pay the $973 + Taxes to get it fixed so i'm going to do it myself. Ordering in the parts later today.
    www.youtube.com/ippielb
    2002 Chevrolet Silverado 1500 z71 1985 Chevrolet Silverado k10 2006 Chevrolet Silverado 2500hd 6.6l LLY Duramax
    6.5" BDS Suspension Lift Edelbrock Carb & Polished Intake Manifold & Valve Covers NAPC Race Transmission & NAPC Built Transfer Case
    EFI Live Comp Cam and Valvetrain Snow Performance Methanol Injection
    35" Toyo Open Country Mud Terrain on 18" Ion Alloy 179's Headman Long Tube Headers and True Dual Exhaust FASS 150gph Titanium Series Pump
    AirAid Cold Air Intake with K&N Dry Filter & AirAid PowerAid Throttle Body Spacer 2" Suspension Lift 33x12.50r15 Tires EFI Live & AFE Stage 2 Intake
    Pacesetter Long Tube Headers with Cats Gone True Dual Exhaust FlowPro 3.73 Gears Yukon Grizzly Locker with Mag-Hytec Cover & Traction Bars
    NGK Iridium Tips & MSD Ignition Plug Wires Baja Spare Tire Holder 33x13.5 Hankook rt03 18" XD Rims
    Innovate LC-1 Wideband o2 Sensor x2 HID's all around LED taillights and 3rd brake light
    BDS Dual Steering Stabilizers Pioneer Double-DIN Touchscreen Navigation with Two 10" Subs under rear seat
    Electric Fan Autometer Pressure, Boost, and Pyro Gauges
    4.56 Gears Airlift Air Bag Suspension

  2. #2

    Cool PO446 EVAP code

    I think that was the code my 05 threw back in May and found the EVAP solenoid was bad. GM has a updated solenoid I purchased from local Chevy dealer (couldnt fine a aftermarket part) for $150.00. You have to run a hose from valve to front of truck for the vent. I mounted mine up near brake booster to keep water out when off road. Make sure you use fuel hose for vent line. I think the hose was 5/8 diameter.

  3. #3

    Default

    It is a common problem. Mine was replaced under warranty.
    Jim

    2004 SILVERADO 2500HD LS
    Pro Comp Leveling Kit
    285-75-16 Cooper ST All Terrains
    Pro Comp Programmer
    Bilstein Shocks
    Linux Bed Liner
    Tinted Windows



    Other rides:

    1967 Landcruiser <350 Chevy>
    1970 Camaro
    1990 Geo Metro Convertible
    2007 FJ Cruiser

  4. #4

    Default

    Can someone show me a picture of this please?

  5. #5

    Default

    Never mind, took it to a different shop, and i had them clean out my hoses and the compressor and everything. $70 instead of $1000, i think i made the right choice.

  6. #6
    Sr. Apprentice
    Join Date
    Feb 2009
    Location
    FT. Wayne, IN
    Posts
    44

    Default

    Here's a write up I did awhile back on this!

    http://www.gmtruckclub.com/forum/showthread.php?t=18964
    2003 Silverado LS 1500 Xcab 5.3 vortec 3.73 rear.
    2000 Artic White Buick Regal GS, 3.4 pulley, 3"dp, 13.81 @ 101 (sold)
    2002 Z28 Camaro, 1sc, a4, slp lid, headers, cb exhaust, 3.73

  7. #7

    Default

    So, two days ago, my check engine light came back on, I go to part source and get my codes read(for free i might add) Threw the same code. So, I knew exactly what happened, either they didn't do a good enough job to clean it, or they didn't put it all back together properly. And after the guy read my codes, i start my truck back up, and the light is off now, did he erase the code? I was planning on going back to the shop i went to and show them my lights back on, and they didn't fix it properly. If they read my codes again, will it show up? Or will did the guy erase it? And it wont show up anymore...?

  8. #8

    Default

    Quote Originally Posted by ippielb View Post
    So, two days ago, my check engine light came back on, I go to part source and get my codes read(for free i might add) Threw the same code. So, I knew exactly what happened, either they didn't do a good enough job to clean it, or they didn't put it all back together properly. And after the guy read my codes, i start my truck back up, and the light is off now, did he erase the code? I was planning on going back to the shop i went to and show them my lights back on, and they didn't fix it properly. If they read my codes again, will it show up? Or will did the guy erase it? And it wont show up anymore...?
    Unfortunately he erased the code and with it the freeze frame data. The code is probably still is history codes however. The freeze frame data is very helpful in diagnosing the code. It shows when the code set and what was going on at that time.

  9. #9

    Default

    So, if i wait will the light come back on? Or am i basically screwed now?

  10. #10

    Default had same problem

    i had the same code on my 2005 tahoe. i used alldata to help me with pictures and descriptions. removed vent valve and inspected. ended up purchasing new valve from dealer for $30.00, installed and cleared code with scan tool. problem is gone. did the repair back in january.

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