Check Engine light came on as I was driving home the other day, steady, not flashing. Code is P0440, Auxilliary Emissions Controls: "Evaporative Emission Purge Control Solinoid Damaged".

Car is still under warranty, just haven't had time to get it to the shop, haven't been driving it though, just in case. Anyone know if this code is a big deal or simply a minor inconvenience.
Thanks

 

i have the same problem here
anyone know what can be wrong/
what should i check for?

 

It could be something as simple as a bad gas cap, or could be something like a bad line towards the gas tank I had the same code, had to do a smoke test, and found out I had a hole in the left side gas tank.
Theres a thread about this code I wil try and find it.
Ok I found the part I saved but couldent find the link, hope this helps a lil, try to do a good search and you will prob find this thread






..my OBD says it is an "EVAP Emissions Malfunction".. I have: 1.Replaced gas cap..3times 2.Replaced EVAP Solenoid(GM part) 3.Replaced PCV...4. Erased this 440 code several times but it keeps coming back via Check Engine signal...and yes, I have Kooks long tube headers,hi-flo cats but with 02 "Simulators"... my performance team believes a "Smoke Test" is the last resort to locate this fuel-tank-related tiny air leak ... ANY OTHER THOUGHTS OR CURES OUT THERE???


your fault is for a large evap leak.there is a green cap on the left side of the motor in line with the purge valve.this is the evap test port.make sure that cap is tight.also are you sure you have a non-vented gas cap.


BINGO!!...located the Evap Test Port Cap (mine's Black,not green) and it was NOT TIGHT...turned it full turn & 1/2...now, it is dang tight!...the new gas cap is the NON-vented type....so, I think you great minds have given me hope . The "Check Engine" light, IS NOT a pretty light, THANKS, Bill

Look for the pipe being properly attached to valve on the side of the motor. After I installed my LS6 manifold I did not get the pipe on all the way and got that code, along with a horrid gas stench when I parked the car.

go under the car on the right hand side near the gas tank you will see the evap[charcoal]canister with 3 hoses on it.1 goes from the canister to the tank,1 goes to the purge valve,the other goes to the vent valve.if all the hoses are ok and the electrical connector is ok theb vent valve could be bad.when the car performs the test and applys a vacuum to the tanks the evap valve is open and the vent valve must be closed.if the vent valve is stuck open,it won't allow a vacuum to be applied.


We replaced the EVAP solenoid unit ( GM part ) last week, checking hoses and electrical connector. replacing this solenoid unit did NOT FIX IT. IS THE VENT VALVE you refer to, a part of this unit ? or is it located in the cannister?

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02-01-2006, 07:13 AM #11
dpd
CF Senior Member



Member Since: Oct 2003
Location: bloomfield nj

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the vent valve is part of /attached to the charcoal canister.you can't miss it.the car will only do the evap/tank test if the fuel level is between a 1/4-3/4,if you are above or below,it will not perform the test.with your fault you either have a hose that's off or one that has a hole in it that is big enough to see,or the vent valve is not closing[you said you've replaced the gas cap with a known good/correct cap].
the vent valve keeps the gas tank from collapsing.

 

Thanks for your efforts in finding this info. As of right now my mechanic says it was the gas cap. I hope that's true, I guess time will tell. Thanks again for your help!

 

let us know how it goes
i am still trying to figure out what is wtrong with mine
i have th same code poping up
where is that cap on the side of the motor?