Boxster S (987) F6-3.4L (2008)
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no fault of throttle position sensor
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no fault of canister purge valve
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no fault of canister purge valve power stage
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no fault of mass airflow sensor
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no fault of misfire detection
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no fault of engine coolant temperature sensor
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no fault of secondary air system
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no fault of upstream oxygen sensor
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no fault of downstream oxygen sensor
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no activity of forced oxygen removal
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modeled catalyst temperature within calibrated range
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modeled catalyst temperature gradient lies below calibrated threshold
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engine exhaust gas mass flow within calibrated range
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time after engine start exceeds calibrated threshold
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desired air-fuel ratio for catalyst diagnosis applied
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engine start temperature exceeds calibrated threshold
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diagnosis of catalyst not yet performed
Flowchart