Has anyone really ever fixed a P0440 evap code
Thread Starter
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Joined: Apr 2006
Posts: 51
Has anyone really ever fixed a P0440 evap code
I have a 2002 SS. I have replaced the gas cap. Replace the purge solenoid, with no luck. I have checked for hose cracks, with no luck either. I guess I will try the vent valve next. Whats next. Thanks for any help. Dave
Hi `Dave,
Check out the below link I had in my files.
Hope it helps,& check back to see what other
member's post for their repair on your subject problem.
Good Luck
http://repairpal.com/OBD-II-Code-P0440
Check out the below link I had in my files.
Hope it helps,& check back to see what other
member's post for their repair on your subject problem.
Good Luck
http://repairpal.com/OBD-II-Code-P0440
Common Problems That Trigger the P0440 Code
- Missing fuel cap
- Defective or damaged fuel cap
- Distorted or damaged Fuel Tank Filler Neck
- Torn or punctured Evaporative system hose(s)
- Defective Fuel Tank Sending Unit gasket or seal
- Split or damaged Carbon Canister
- Defective Evaporative Vent Valve and/or Evaporative Purge Valve
- Defective or damaged fuel tank
Last edited by Space; Sep 10, 2010 at 05:53 AM.
Joined: Jun 2009
Posts: 435
From: New Hampshire
The vent valve is the number one cause for evap codes in gm vehicles. Check your filler neck too. They sometimes rust where the cap goes. The neck is 2 pieces, plastic and metal and the metal separates from the plastic.
Thanks Member's Brian, Keith & labNjab for your
help to other Monte Carlo family member's.
Sometimes we 4get to say thanks, but it's great to belong
to a forum & see so many member's helping each other.
It does not go un/noticed 4-Sure...
Wish the reader of this a `Happy
Peace/Out
to a forum & see so many member's helping each other.
It does not go un/noticed 4-Sure...
Wish the reader of this a `Happy
Peace/Out
`Dave, let us know if any of the above has helped.
Good Luck
Good Luck
Thread Starter
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Joined: Apr 2006
Posts: 51
Well, no luck yet. I've tried two gas caps. I seem not to find the vent valve? I wish I could find a photo of the vent valve on the car. I tried to check the hoses, I cant find anything. Not sure what to do next. Thanks for all who helped.
Monte Of The Month - February 2010
Joined: Apr 2009
Posts: 11,981
From: Pittsburgh, PA
from gm parts direct.....http://www.gmpartsdirect.com/
1) Fuel tank2) Strap Right3) Filler cap4) Filler pipe5) Filler pipe Bracket6) Connector hose7) Connector hose Clamp8) Valve9) Drain hose10) Fuel pump11) Cover12) Cover Seal13) Feed line14) Return line15) Wire harness16) Vapor canister17) Vapor canister Strap18) Canister hose19) Vapor hose20) Vapor hose Connector21) Pipe Emissions front22) Vent valve23) Bracket 1st design24) Pipe Emissions rear25) Pipe Connector26) Shield27) Filter28) Filter Bracket29) Level sensor30) Pressure sensorDescriptionYearMSRP PriceYour PriceVent valve
01-05 $25.69$15.23
1) Fuel tank2) Strap Right3) Filler cap4) Filler pipe5) Filler pipe Bracket6) Connector hose7) Connector hose Clamp8) Valve9) Drain hose10) Fuel pump11) Cover12) Cover Seal13) Feed line14) Return line15) Wire harness16) Vapor canister17) Vapor canister Strap18) Canister hose19) Vapor hose20) Vapor hose Connector21) Pipe Emissions front22) Vent valve23) Bracket 1st design24) Pipe Emissions rear25) Pipe Connector26) Shield27) Filter28) Filter Bracket29) Level sensor30) Pressure sensorDescriptionYearMSRP PriceYour PriceVent valve
01-05 $25.69$15.23
Thread Starter
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Joined: Apr 2006
Posts: 51
I finally got the vent valve on order. Now where is it on the gas tank. Am I going to have to drop the tank or can it be done without dropping it. Has anyone ever changed one. Once I get it in my hands I should be able to find it on the tank, just by comparing parts. Thanks for any help. Dave