sometimes you can get it to work without actually driving the car.
just hold the following RPM ranges from 2-5 minutes:
Idle
1500
2000
2500
3000
Idle
the checks usually happen before the 5 minutes is up, but without a scan tool hooked up you won't know when it happens.
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dave
2001 Porsche Boxster S
1988 Porsche 928 S4
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