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2000 Pontiac SunFire/code 440/evaporative emission control system malfunction

Please help. What is the EECS on this vehicle? What do I look for and how do I correct it?

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  • 9 Answers

SOURCE: evaporative emission control system

9 times Out of ten !!!
Did You Get Gas and Leave the Vech Runnung while Filling Up ??
This will turn CK ENG light On !! and Cause EVAP Code ??

Is The Fuel Filler Neck Rusty ?? UNDER VECHILE) any vapor leak preventing vacum to build will set this code !!!

Posted on Jan 07, 2009

Molson02536
  • 3854 Answers

SOURCE: 1998 PONTIAC SUNFIRE ADVISE

Exhaust Gas Recirculation System Is the main problem here. the other code P0118 may be a bad temprature sensor or your thermostate needs to be changed. Last it could be a weak water pump. 

So what is an EGR system and how does it work? EGR stands for Exhaust Gas Recirculation, and as its name implies, this system allows exhaust gasses from your car to be re-circulated into the engine, helping to reduce emissions. These systems are mostly comprised of the EGR valve, a DPFE (Delta Pressure Feedback EGR) sensor, hoses, a vacuum regulator, some vacuum lines, wiring, the computer and the exhaust tube leading to the valve itself. 
The car's wiring can be tested in the normal fashion by looking for broken and lose wire, and all vacuum lines can be checked easily for cracks, leaks and correct routing.
The last thing i would then check is the the EGR valve, EGR vacuum regulator and DPFE sensor (or similar flow sensor).
I hope this helps and good luck

Posted on Apr 09, 2009

Molson02536
  • 3854 Answers

SOURCE: I GET A TROUBLECODE 0440, STATING EVAPORATIVE

I will give you a little insight on what the P0440 fault is if you promise not to blame me if your taillight bulb burns out!!

A P0440 fault is general Evap system fault and could be as much as leaving your gas cap loose. ( but you probably wouldn't admit to it anyhow.)
Assuming that the gas cap is tight and not hanging off there are a couple of hoses that dry rot and could cause this fault to set, One is under the vehicle at the Canister and the other under the air cleaner. There is also a
switch called the NVLD (Natural Vapor Leak Detection) that is supposed to see a closed (sealed) input when the evaporative system is sealed and no leaks are present. If this switch goes bad it will also set this fault code.

A scan tool would be needed to see this input. With high mileage vehicle I would lean towards the hoses being cracked causing your problem. If you cant visual see any cracks in any hoses you may have to have a smoke test performed along with a scan tool connected to verify the fault and diagnose the problem.

I believe Auto Zone will scan your car for free but check the Gas Cap first or try replacing it. The gas cap is the cheapest to replace and most likely the problem.
Good luck and hope this helps. Oh and when you get the car scaned, they can clear your code. 
You can also try clearing the code by placing the ignition key to the run possition and removing the fuse to the ecm for 10 sec and placing it back in. 
Start the car and it may stall but let it, just start it up again and it should be fine. The computer is just re-learning the engine and you should have no code for now till it finds one.

Posted on May 02, 2009

bschilz
  • 2049 Answers

SOURCE: P0449 Evaporative Emission Control System Vent

While looking for the location of the vent/solenoid for you, I came across a blog that said this error can be caused by a loose or faulty gas cap. You may want to look at that first and possibly solving the problem. Replace the cap, get autoparts store to reset the code and see what happens.

Posted on Jan 07, 2010

  • 104 Answers

SOURCE: my 2000 chevy venture i have two engine codes

Clean the carbon out of the intake, and the EGR ports, use some carb cleaner and gently use a coat hanger for the smaller hole, toothbrush for the rest. They are probably clogged. Take the EGR valve back off to do this and the air tube off of the throttlebody, you can open the butterfly by hand and clean that too while you are in there.

Posted on Jun 23, 2010

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