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Old 11-15-2007, 05:32 PM   #15
Tool Pants
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Join Date: May 2002
Location: San Jose
Posts: 1,889
In 1998 Porsche changed the emission system. The fuel tank is pressurized to check for leaks in all the plumbing. If the the sensor detects a loss of pressure or the sensor is defective then the check engine light comes on. If the O-ring seal on the cap is not sealing well then you can also get a check engine light.

For 1998 up to I forget what year, there was a recall to replace the orange O-ring with a black one.

Then there was another recall for 1998 to I think 2001 to replace the cap with the 2001 style cap. A sticker was placed in the trunk lid for this recall. You should not have the cap that was used 1998-2000.

Don't know what cap you have. Don't know if the sensor is the problem. Don't know the problem until you have the fault code(s) read, unless it is clear you do not have the updated cap.

Last edited by Tool Pants; 11-15-2007 at 05:34 PM.
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