Check engine light on, P0447 codes 96 and 99.

[placid]

Hi,

I got readings from my Boxster 1997 today. The car is US-model and made in Stuttgart. I have my Check Engine light on with code:

P0447

Code: 96 (Shutoff Valve Activated)

Code: 99 (Tank Pressure Sensor)

I reset the codes, tried with another (although used) cap for the tank but it did not help.

If I reset the code and drive on the highway (tried for 1 hour), light will not come but if I leave the car running while parked, light will come in about 10 minutes.

Any suggestions?

Thanks again!

Edited September 2, 2009 by placid

[Loren]

P0447 EVAP Canister Shutoff Valve (Output Stage) - Open Circuit

Possible causes

- Wiring harness

- Shutoff valve

- DME control module

[placid]

I finally decided to take care of the problem. I removed the wheel lining to access the evaporative canister and wham! I am missing the WHOLE valve and the wiring...

I ordered the valve but could not find a a loose cable to insert.

Where should I start looking? Where is the valve connected?

[placid]

I found something from another forum that suggests that some versions would not even have the valve on the carbon canister.

Have anyone seen anything similar?

http://986forum.com/forums/performance-technical-chat/30449-carbon-canister-question.html#post311499