CEL! throwing P0441 code

Guitarheroal · Post by **Guitarheroal** » Tue May 10, 2011 10:23 am

I know this CEL has been gone over several times, but i just recently got it and am trying to narrowing down to what the culprit might be. P0441- Evaporative Emission System Incorrect purge flow. So basically, about 3 weeks ago, i installed a cosmo sri on my 2004 vibe gt. Aside from some horrible fitment issues, mechanically, everything was ok. Fast forward 2 weeks later, my CEL comes on in the morning on my way to work. After work, i took it to autozone, to get it scanned. Right when the autozone guy comes out with a scanner, the code goes away, making me look like an idiot. Another week pasts, and the CEL comes back on (yesterday). I take it to AAMCO today to get it scanned, and its throwing a P0441 code. The guy tells me its really not a big deal, and he would just leave it alone. I hate having that yellow light staring at me, so i would rather get it shut off. He also mentioned that it might be a bad hose, or purge solenoid. Right when he said hose, i thought that maybe i had routed some of my hoses incorrectly when i installed the intake. So here i am now. Just wanted to reach out to the vibe community to see if all the hoses are connected to the right places. on to the pictures: Here is the full picture of the intake installedHere is the sensor i removed (told by the cosmo folks that it wouldn't be used anymore):Here is the line that was connected to the sensor and is now capped off, and finally, some pictures the other hoses:The other end of the red hose is connected to the intake. Everything look ok? If the hoses all look correct, then i will probably clean the MAF sensor and if that doesn't work, get a new gas cap, then new purge solenoid.Just wanted to throw in that the car runs completely fine and got 29 mpgs my last tank. No high or rough idle, pulls all the way to redline ok. If it wasn't for the CEL coming on, i wouldn't be able to tell that something is wrong. I can also take more pictures if something is confusing. Thanks for the help!

MotoAce51 · Post by **MotoAce51** » Tue May 10, 2011 10:41 am

The funny thing, I was just about to post a topic about the exact same issue. This weekend I installed the Helix TB Spacer. I drove it all weekend, yesterday and today. On my ride home today I went to get off my exit and my CEL came on. Low and behold, same issue. I had the computer reset and now I will wait and see if it comes on again.One thing the auto parts store noted is to pay attention to fill-ups. Does the cap his when you open it? If so it may be the solenoid.

Guitarheroal · Post by **Guitarheroal** » Tue May 10, 2011 11:03 am

it actually use to hiss when i would open it. But it doesnt anymore...so that could possibly be the culprit. Still open to any input tho! hoses all look good??

MotoAce51 · Post by **MotoAce51** » Tue May 10, 2011 7:22 pm

Talking to some guys around me they said to look into doing a smoke test. I guess this part is extremely hard to diagnose. All the hoses look good to me, but why did you remove the Sensor? I haven't seen anything saying to take it off.

Guitarheroal · Post by **Guitarheroal** » Wed May 11, 2011 2:21 am

what is a smoke test? in the instructions that came with the intake, it said to take that sensor off cause its not needed? i also emailed them about it and they confirmed to take it off.

Guitarheroal · Post by **Guitarheroal** » Wed May 11, 2011 7:48 am

bump for some help. would like to get this CEL resolved before the weekend! going on a 400 mile trip!

MotoAce51 · Post by **MotoAce51** » Wed May 11, 2011 9:51 am

Not much help but I talked to some people abou tthis. I had the code reset and so far drove almost 300mi and no light. When I talked to my dad, there are a couple things that could cause the issue. If when you were installing the intake you kinked a hose or something there could be a small crack forming. Any vaccume leak will apparently throw that code. Another could be the fuel system not venting properly since its a closed circuit. From what he said its a lot of testing and checking to see what number of problems could cause the issue. I guess on some cars the gas cap can also be the culprit. If its not on tightly it causes a venting issue and can trip a code. (not sure if its the same one).And I have no idea what a smoke test is really. But from what I gather is they check all the possible lines for leaks. Ill guess they blow a smoke machine around and see if there is a disturbance. Again this is more of a guess than anything. But I guess its like $40

Guitarheroal · Post by **Guitarheroal** » Wed May 11, 2011 10:45 am

Quote, originally posted by MotoAce51 Â»Not much help but I talked to some people abou tthis. I had the code reset and so far drove almost 300mi and no light. When I talked to my dad, there are a couple things that could cause the issue. If when you were installing the intake you kinked a hose or something there could be a small crack forming. Any vaccume leak will apparently throw that code. Another could be the fuel system not venting properly since its a closed circuit. From what he said its a lot of testing and checking to see what number of problems could cause the issue. I guess on some cars the gas cap can also be the culprit. If its not on tightly it causes a venting issue and can trip a code. (not sure if its the same one).And I have no idea what a smoke test is really. But from what I gather is they check all the possible lines for leaks. Ill guess they blow a smoke machine around and see if there is a disturbance. Again this is more of a guess than anything. But I guess its like $40thanks for the response and updates, you are way more proactive than i am. I guess we are in this together. I cleaned my MAF sensor, so by default had the code reset and it didnt come back and its been about 50 miles. i will probably just replace the gas cap tomorrow, just to be safe, and i have free 15 dollar credit to pep boys. it seems like it will be a relatively drawn out and patient process to solve this code. At least the car is running great and seems to not have any problems.

jasonvibe · Post by **jasonvibe** » Sun May 15, 2011 3:08 am

The Cosmo guys are likely wrong. The valve was there for a reason.DTC No. DTC Detecting Condition Trouble AreaP0441 Pressure in charcoal canister does not drop during purgecontrol (2 trip detection logic) During purge cutâ€“off, pressure in charcoal canister is verylow compared with atmospheric pressure (2 trip detectionlogic)Vacuum hose cracks, holed, blocked, damaged or disconnected((1), (2), (3), (4), (5), (7), (8), (9), (10)and(11) in Fig. 1) Fuel tank cap incorrectly installed Open or short in vapor pressure sensor circuitVapor pressure sensorP0446 When the vapor pressure rises to a specified point,the ECMopens the VSV for CCV. Pressure will increase rapidly becauseof the air allowed into the system. No increase or anincrease below specified rate of pressure increase indicates arestriction on the air inlet side. The ECM closes the VSV for pressure switching valve. Thepressure rise is no longer as great. If there was no change inpressure, the ECM will conclude the VSV for pressure switchingvalve did not close.Va or ressure Open or short in VSV circuit for EVAP VSV for EVAP Open or short in VSV circuit for CCV VSV for CCV Open or short in VSV circuit for pressure switching valve VSV for pressure switching valve Fuel tank cracked, holed or damaged Charcoal canister cracked, holed or damaged Fuel tank over fill check valve cracked or damagedECM

CEL! throwing P0441 code

CEL! throwing P0441 code

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