Hello guys,
I have installed my Utec and the knock sensor with my friend yesterday. Everything is running right but I didn't finish yet, and I haven't installed the Tuner Pro yet. Today a check engine light pops up with code number of P1444. I don't know what the problem is. For those who have done the installation, do you guys have a check engine light? Or is it just me and my friend, because we both have the same setup and the check engine light. Also I have installed another kind of gasket that is between the engine and the intake manifold; I thought this could be the problem (the new gasket can block some heat from the engine).

Any idea

 

P1444 Purge Volume Control/V
double check to make sure there is no vacumm leak... upper and lower plenum, intake, etc... try that and clear the code. if this doesn't work i'm sure someone else might chime in to help...

 

i have sane set up no code

 

did your friend try this new gasket also. do you understand that the way the lower runners sit down into that V that you cant really use any thicker of a gasket without milling down the lower runners accordingly, you might be getting a small vacuum leak right there and throwing the code.

no problems with that code and the utec on me or any other ones i have helped out with....

 

I am "his friend" who did the install. The gasket he is refering to is the Motordyne Aramid lower collector gasket that comes as part of the iso- thermal gasket kit. Not the gasket on the lower runners.

 

Thanks guys for the help. I will let you know how everything is going.

 

oh gotcha, yeah i just saw the lower runners out and what he said could have been taken to go in either spot. good luck with it all!!

 

Did you ever get a solution for the P1444 code?

Dave

 

I would also like to know if there is a solution for the P1444 code? So if it ever happens to me I can fix it.

Matt

 

If/when I find a solution, I will let you know.

Dave

 

Don't know if this helps at all, but ever since i took my Z to lower elevation, the code is non existent.

 

Well, I live in Colorado Springs, so not much choice there (~6000 ft) It only happened after the UTEC and JWT TT install, so obviously it is related to one or both of those, but the elevation might be making a difference as well.

Dave

 

Thanks Dave

 

I also have the P1444 code thrown with a kinetix v+ plenum and a utec w/o tuner. I have the Utec on map 0 until I get the tuner installed but I have had this code since day 1. It also appears that my car is running richer now with this code and with the utec. It also doesnt start as easily. Anyone have a solution to this problem?

 

No, haven't found a solution yet, but after hearing this from you, and talking, I'm very positive it has to do with the UTEC, since only UTEC people are getting this code. I think the altitude also has something to do with it; what elevation do you live at?

 

im at 2500 ft in Tucson

 

by any chance did you forget to plug in the plug at the back of the manifold.....it is a solenoid related to fuel vapors from the gas tank. the plug is on the back, passenger side of the intake manifold. there is a large vacuum line coming into and out of it.

 

Not me; I checked all lines and connections, everything is good.

Good suggestion, though, since that solenoid is one of the main parts of the thing the P1444 code is related to.

 

I found this googling (don't have a utec, but researching it). If you have CIPHER, you might be able to do this dx on your own:

NISSAN MIL ON, DTC P1444, OR P1440, OR P1491
ALTIMA 1998-2000
FRONTIER 1998-2000
PATHFINDER 1998-2001
QUEST 1999-2000
XTERRA 2000

Customer Symptom:
The MIL is on.

Incident Description:
DTC P1444, EVAP Canister Purge Volume Control Solenoid Valve or P1440, EVAP Control System (Small Leak) (Positive Pressure) or P1491 Vacuum Cut Valve Bypass Valve are stored in self diagnosis memory.

Root Cause:
The Purge Volume Control Solenoid Valve (P/N 14930-9E010 or 14930-9E011) leaking (stuck open slightly).

Service Procedure:
Check the EVAP Purge Volume Control Valve for leakage using one of the following methods:

Preferred method:

Connect CONSULT, turn ignition key on but do not start the engine.
Select Engine, Data Monitor, EVAP System Pressure Sensor.
Note the reading. It should be between 3.32 and 3.40 volts.
Start the engine and allow it to idle. If the voltage noted in step 3 decreases, replace the EVAP
Purge Volume Control Solenoid Valve.
Alternate method:

Disconnect the vacuum hose for the EVAP Purge Volume Control Valve from the intake manifold
and connect a hand vacuum pump to the valve.
Apply vacuum. If the vacuum does not hold, replace the valve.
Source:

 

Yeah, I found that as well, but....

All of us with the problem have UTEC's and live at higher altitudes. So, I don't really think it is due to an actual failure of anything (like the EVAP valve), but rather due to something involving the UTEC.