P0444 EVAP purge valve

[Gordonn]

I'm getting a P0444 on my 07 CS. (EVAP purge valve open circuit -according to https://rennlist.com/forums/997-forum/800382-generic-obdii-codes-part-1-and-2-p0001-to-p3493.html)

This is after installing an IPD plenum, new AOS and a new crankcase vent hose by threading it under the intake (I may have damaged something? do I have some other vacuum leak?)

Does anyone have a DIY for replacing the evap purge valve? The part is $500 and it looks to include the hose that goes all the way to to fuel tank(?) from under the driver's intake manifold.

My current plan is to take off the manifold and inspect for damage to the valve/wiring/hose first. Can I apply 12v to the valve to test?

Any other help with solving this code would be greatly appreciated!

[pdxfj]

I had a EVAP test pump failure code last year and had to replace it. The cost of the pump and purge valve unit wasn't that bad. Didn't get it from Porsche. There is a direct Bosh replacement.

It's located in the frunk, under all of the trim, passenger side. Tucked away in the black box that sits on top of the fuel tank (under where the CD changer is/would be). When using my Durametric setup, I could hear the purge valve opening and closing in the frunk. Of course the error was for the pump not coming on when commanded, which was bad.

EVAP systems need vacuum for their test to make sure it's a sealed system. Usually in front engine vehicles, they get that from engine vacuum, but in the case of the Cayman there's what could be an aquarium air pump that runs to generate vacuum.

Hopefully this helps point you in the right direction.

Could be a complete coincidence the purge valve died. If you have a Durametric or similar and can command the purge valve to open, you should be able to hear it clicking.

The EVAP purge valve should be 12v. It's just a solenoid to open and close the valve.

[snaward]

Originally Posted by Gordonn

I'm getting a P0444 on my 07 CS. (EVAP purge valve open circuit -according to https://rennlist.com/forums/997-forum/800382-generic-obdii-codes-part-1-and-2-p0001-to-p3493.html)

This is after installing an IPD plenum, new AOS and a new crankcase vent hose by threading it under the intake (I may have damaged something? do I have some other vacuum leak?)

Does anyone have a DIY for replacing the evap purge valve? The part is $500 and it looks to include the hose that goes all the way to to fuel tank(?) from under the driver's intake manifold.

My current plan is to take off the manifold and inspect for damage to the valve/wiring/hose first. Can I apply 12v to the valve to test?

Any other help with solving this code would be greatly appreciated!

I know this is several years ago - but I just had the same issue after doing the AOS and breather hoses. Did you find the solution? I am thinking a pinched vacuum hose or something.

Thanks

[JFP in PA]

Originally Posted by Gordonn

I'm getting a P0444 on my 07 CS. (EVAP purge valve open circuit -according to https://rennlist.com/forums/997-forum/800382-generic-obdii-codes-part-1-and-2-p0001-to-p3493.html)

This is after installing an IPD plenum, new AOS and a new crankcase vent hose by threading it under the intake (I may have damaged something? do I have some other vacuum leak?)

Does anyone have a DIY for replacing the evap purge valve? The part is $500 and it looks to include the hose that goes all the way to to fuel tank(?) from under the driver's intake manifold.

My current plan is to take off the manifold and inspect for damage to the valve/wiring/hose first. Can I apply 12v to the valve to test?

Any other help with solving this code would be greatly appreciated!

While P0444 could be the valve itself, more often it is an electrical issue, hence the "open circuit" descriptor.

First step is to test to see if the valve is getting voltage, so I would start there.