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Old 01-20-2007, 07:53 PM   #1
subbyspeed
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Join Date: Mar 2002
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Location: Columbus,OH
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2001 GM6 2.0L vf30
e30 black/rust

Default P1446? Get rid of it!

Well, since i did my swap, i've had the P1446 code. As you may know, on the USDM models 03+, have the extra vsv for the gastank. I never bothered switching gastanks to remedy this problem.. Thats alot of work for 1 stupid sensor that really doesn't do much.

So finally, i got off my lazy butt and decided to make something up to rid myself of this stupid code. Its easy. Real easy. Should have done it a long time ago. I did it as follows:

1. Obtain old/new vsv, whatever your preference. Any will do, i just happened to grab one at work i had laying around. As long as its a 2 wire vacuum switching valve, it'll do.

2. I have spare wire harnesses both at work and home.. I simply found a connector that plugged into the vsv. Cut it with some extra wire.

3. This applies for my 04 wrx setup. Yours may differ.
Locate ecu connector B84. Pin #23 is the one you need. Its a red/blue wire. If you have there already, cool. If not add it. This is the wire you must add to the ecu, because its ultimately what the ecu will look for as far as something being there. Its the ground side of the vsv.

The power side of the vsv, following the wiring diagram, goes to the ecu also (pin #2 of B84), and supplies power to the other gas tank related vsv's. Although you don't need to worry about it, because its not particular to that 1 vsv. Just find a constant (IG on) power source and hook it up for your power.

4. Find your happy spot to put it.

5. Enjoy the darkness of not having the check engine light shining in your face at night.

Merely a how-to tutorial of how i defeated it.. Your experience may differ. I welcome all posts related, and how you got rid of it.
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Old 01-21-2007, 09:42 AM   #2
maddbmxjumper
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stage 3 vf23 rs

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its about time someone figured this out, im gonna go do mine now. thanks man! kyle
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Old 01-21-2007, 10:08 AM   #3
Jaxx
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the other option is to flash it out with openecu

could you use a resistor instead of the vsv
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Old 01-21-2007, 11:01 AM   #4
subbyspeed
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i have heard about the resistor thing once.. Do you know what resistor to use for it? Is it like the EGT thing where it has to be a certain resistance?
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Old 01-21-2007, 12:20 PM   #5
Jaxx
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measure the resistance of the vsv...
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Old 01-21-2007, 12:30 PM   #6
subbyspeed
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good point.
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Old 02-15-2008, 09:37 AM   #7
thrdeye
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Can anyone confirm if the connector and Pin numbers for this fix are the same on an 03 ECU?
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Old 02-18-2008, 04:38 PM   #8
thrdeye
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Okay, the 03 and 04 are not the same.

I think I will need to put the wire into B137, Pin 23, which in my 02 harness, has no wire present. I only guess this because PIN 22 is Fuel tank pressure
control solenoid valve, just like the 04

http://www.northursalia.com/modifica...ng/wrxpin.html

Which is the power side of this valve? I guess I'll need to build a harness for it.
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Old 08-24-2008, 01:45 PM   #9
PoopRSkupe
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'08 Forester XT

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i have an 04 wrx swap into my 2000 RS. my P1446 came on only after i went catless and flashed a cobb stg 2 93 map. is the solution the same as the OP's?
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Old 08-25-2008, 07:20 PM   #10
ciper
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AWD 946 Rio Red Jpn built

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It takes 45 seconds to disable the code with the open source tools. With the code disabled the car will run normal, pass smog and the check engine light comes on whenever something else is wrong.

That said I congratulate your hard work on finding a second solution to this problem
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