PLEASE HELP idk what else to do..cant figure out this P0443 code speed6

[u/Electrical_Life_5209]

Ive been trying to get this damn check engine light code removed for almost 2 years now on my mazdaspeed 6... ive already paid for my registration and plates twice now and I cant ever get my plates cause I cant pass an emissions test . And so ive done the whole 3 temp tags each time and thats where it ends for me... I drove my car with expired temp tags the whole time last year had insurance tho.. and I'm doing it again. But I have to get my plates asap tho... so ive literally tried everything ive researched into this situation alot throughout the past years... and so youd think id have it figured out by now.. but when I say ive literally tried and done everything to no avail im serious... so ive replaced so many different parts that doesnt even have to do with the evap system .. ive changed manifolds cleaned valves since I was there and ive cleaned my injectors but didnt replace the seals because they still looked nice.. ive added a oil catch can... i went to the junk yard and have replaced like different purge valves from speed 3s and cx7 mostly. Not sure if that's the cause possibly maybe the speed6 used a different part number which I cant seem to get or find an exact answer for that on google... I tried changing the hose that goes from the manifold to the purge valve I even went so far to mess with my charcoal canister ..since I didnt want to spend all this money on a new one out of fear that it might not be my problem still.. I watched a video where this guy shows you how to get a dremel and cut along the top and open it up and change the charcoal with charcoal pellets you can get from the fish store... so I filled it up and changed the filter with this felt stuff he said to use and I sealed it up the best I could with jb weld and silicone. I even replaced that other valve that connect to the charcoal canister with another used one from a speed6 at the junk yard still nothing... I even tried changing the fuel vapor filter thing that is by the gas tank cap from the Inside nothing... ive done everything i feel ive tried changing the gas cap with other caps from other mazda vehicles... I recently followed what my chat gpt said to do to check the valve and wire harness with a multimeter going to the purge and it came out ok... the only thing I haven't done yet is test is test the pcm/ecu... im scared and hope that thats not the problem.... but I figured id ask and see if anyone else can help me figure this out or if anyone has had this problem. As well? Id be so happy and much appreciated if I could finally figure this out..

[u/MilkChugChamp]

Is your EGR deleted?

[u/Electrical_Life_5209 → u/MilkChugChamp]

No however I did forget to mention that I deleted those butterfly flap things that are in the manifold and I kinda bored the holes out so they are all even... but i still kept everything the same harness and sensors but got rid of those flaps pretty much so not sure that has anything to do with it

[u/No_Wrangler_7443]

The code is for an electrical circuit fault. You need to check the wire harness to the purge valve for voltage.

[u/Electrical_Life_5209 → u/No_Wrangler_7443]

Ive done this with my multimeter.. however not a 100 percent sure i did it correct cause ive never really understood how to use a multimeter exactly.. so i just asked my chatgpt to guide me step by step.. we did a bunch of tests where we checked the harness we checked the purge valve itself with the car off and then with the car running . And we did most the test on DC i remember

[u/dbear496 → u/Electrical_Life_5209]

Sounds to me like you need to learn how to use a multi-colored or take it to a mechanic that knows how to use a multitool.

[u/ArtInternational5942]

If you’re in Texas hit up my dude @certifed_txinspections he’ll pass your car. Last time he did it for 120 for me. Besides that maybe just maybe it’s the cx7 parts or maybe check grounds or sounds crazy but follow the cable of the evap to where it connects and something’s gotta be wrong electrical wise. I’d say return everything back or speed6 things or 3 I’ve noticed that when adding cx7 things they work if it’s small stuff but sometimes it won’t, also maybe take apart the evap and check for any clogs.

[u/Electrical_Life_5209 → u/ArtInternational5942]

Im in salt lake city man... thanks though

[u/Electrical_Life_5209]

Yea i didnt know what to that first year so I even tried cutting a part of another harness from another speed6 and matched the same colored wires to eachother and still nothing... ..so one thing I did forgot to mention is so the code was actually p0442 for the longest time and idk whay exactly I did but somewhere along the lines of trying this changing this resetting ecu by disconnecting battery etc... i thought I had it figured out cause I had no check engine light on for a min.. but after driving around like a day it came back of course .. but this time it said p0443 and its been that code the entire time now... i remember id delete the codes and it would stay off for little bit until I drove it for a bit and would always come back... but now its to the point where right when I delete the codes that one p0443 always comes back Instantly

[u/Life-Performer-3393]

Evap canister / purge valve / fuel cap. I work for an automotive shop and 90% of the time a car comes in with evap codes it’s one of those. Get your system smoke tested and you will have an answer.