We have the same reoccuring code on our newly acquired 2003 Boxster S. I have changed the fuel cap (OEM) and the vacuum valve on the filler neck. Code comes back.
No pressure when I open the fuel cap.
Hate to keep throwing parts at it.
When under the car, I noticed some oil residue under the fuel tank & on top of the undercarriage cover. If it was a gas leak, I would think that it would evaporate but I could be wrong. Could it be a leak where the filler tube goes into the tank?
Any help or suggestions would be greatly appreciated.
Bob, did you finally find your problem? Please share if you did.
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