[Alansglide]

Had the same problem with my 02 Carrera. Followed the drive cycle never exceeding 3k. That meant 59 mph on the freeway for 20 minutes with the air con on. Coasted off the freeway turned air con off , let it idle for 5 minutes.
All of this with half tank of gas or more as recommended.

Drove like a banshee back to the test station and passed with no problems.