Code p0441 - Page 2 - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

Jynx · 05-13-2022, 09:18 PM

i haven't tried that, i didn't even know that existed lol. how do u do that? is there a guide or do u literally just unplug the battery completely and step on the brake a few times? no voltage has always stay steady at 12.9 which i know is a little high.

Jynx · 05-13-2022, 09:23 PM

Quote:

Originally Posted by Ultramaroon

It is weird. Have you tried rebooting (or whatever it's called) the ECU by disconnecting the battery and stepping on the brake for a couple seconds? Did your battery voltage drop just before it started happening?

if you mean just unplugging the battery yes, i have to anyways to get rid of the engine light/limp mode but i dont get what u mean by the brake.

Ultramaroon · 05-13-2022, 09:37 PM

Quote:

Originally Posted by Jynx

if you mean just unplugging the battery yes, i have to anyways to get rid of the engine light/limp mode but i dont get what u mean by the brake.

Oh, gotcha. The brake press is just to make sure the power supply is completely drained. It's a thing.

I just looked at the wiring diagram and I see that the only way for the purge valve to be stuck open is for a short in the wire between it and the ecu, the ecu to be telling it to open for some reason, or for that control transistor (mosfet, whatever) to be shorted.

Jynx · 05-13-2022, 09:53 PM

Quote:

Originally Posted by Ultramaroon

Oh, gotcha. The brake press is just to make sure the power supply is completely drained. It's a thing.

I just looked at the wiring diagram and I see that the only way for the purge valve to be stuck open is for a short in the wire between it and the ecu, the ecu to be telling it to open for some reason, or for that control transistor (mosfet, whatever) to be shorted.

but see i would not know where to even start and the fact that i also get u0155 for using my cruise control makes me wonder just wonder if maybe the ecu is fucked/trashed. im not the original owner but i dont think it has been tuned or anything like that.

Ultramaroon · 05-13-2022, 09:56 PM

Quote:

Originally Posted by Jynx

but see i would not know where to even start and the fact that i also get u0155 for using my cruise control makes me wonder just wonder if maybe the ecu is fucked/trashed. im not the original owner but i dont think it has been tuned or anything like that.

It's possible. I wouldn't start with that unless I had money to blow. Even then, I think there's a whole thing to pairing the ecu to the car. Are you up for that?

Jynx · 05-13-2022, 10:03 PM

Quote:

Originally Posted by Ultramaroon

It's possible. I wouldn't start with that unless I had money to blow. Even then, I think there's a whole thing to pairing the ecu to the car. Are you up for that?

not really but i just want to know what it is and where to honestly start ya know

Jynx · 05-13-2022, 10:09 PM

do u think if there wasn't enough pressure in the lines that the ecu would keep the valve open until there was and then it would tell it to close? i wonder if there isn't enough and the computer doesn't like that and it tries to keep it open. is that possible or is that a dumb thought?

Ultramaroon · 05-13-2022, 10:52 PM

Quote:

Originally Posted by Jynx

do u think if there wasn't enough pressure in the lines that the ecu would keep the valve open until there was and then it would tell it to close? i wonder if there isn't enough and the computer doesn't like that and it tries to keep it open. is that possible or is that a dumb thought?

It's a good thought, but the service manual does say something about a time threshold for the the evap leakdown test. Read up on it and you'll know as much as I do about the logic. I would think it times out and gives up

Jynx · 05-13-2022, 10:57 PM

Quote:

Originally Posted by Ultramaroon

It's a good thought, but the service manual does say something about a time threshold for the the evap leakdown test. Read up on it and you'll know as much as I do about the logic. I would think it times out and gives up

so it wouldn't be possible or would it and it's just timing out? ive had a lot of people say it could be the gas pump rubber seal

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Ultramaroon · 05-14-2022, 12:55 AM

Quote:

Originally Posted by Jynx

so it wouldn't be possible or would it and it's just timing out? ive had a lot of people say it could be the gas pump rubber seal

That's the first thing to rule out. I think you know what needs to happen. Just have to start testing.

Jynx · 05-14-2022, 12:29 PM

Quote:

Originally Posted by Ultramaroon

That's the first thing to rule out. I think you know what needs to happen. Just have to start testing.

is there a fuel tank pressure sensor in this car?

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Ultramaroon · 05-14-2022, 01:59 PM

Quote:

Originally Posted by Jynx

is there a fuel tank pressure sensor in this car?

There's a link to the service manuals in my sig line.

Jynx · 09-18-2022, 05:47 PM

yes. i also had a shop smoke test it for leaks and nothing was leaking. only thing that was weird was when they hooked it up to obd2 reader the shop got a christmas tree so maybe ecu issue?

Jynx · 09-18-2022, 05:48 PM

Quote:

Originally Posted by blsfrs

Are you absolutely sure that you don't have a vacuum leak?

100% it has been smoked tested.

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05-13-2022, 09:18 PM	#15
Jynx Member Join Date: Feb 2022 Drives: 2013 Subaru BRZ Location: AZ Posts: 80 Thanks: 0 Thanked 23 Times in 15 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	i haven't tried that, i didn't even know that existed lol. how do u do that? is there a guide or do u literally just unplug the battery completely and step on the brake a few times? no voltage has always stay steady at 12.9 which i know is a little high.

05-13-2022, 10:09 PM	#21
Jynx Member Join Date: Feb 2022 Drives: 2013 Subaru BRZ Location: AZ Posts: 80 Thanks: 0 Thanked 23 Times in 15 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	do u think if there wasn't enough pressure in the lines that the ecu would keep the valve open until there was and then it would tell it to close? i wonder if there isn't enough and the computer doesn't like that and it tries to keep it open. is that possible or is that a dumb thought?

09-18-2022, 05:47 PM	#27
Jynx Member Join Date: Feb 2022 Drives: 2013 Subaru BRZ Location: AZ Posts: 80 Thanks: 0 Thanked 23 Times in 15 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	yes. i also had a shop smoke test it for leaks and nothing was leaking. only thing that was weird was when they hooked it up to obd2 reader the shop got a christmas tree so maybe ecu issue?

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