Porsche Cayman S (987) F6-3.4L P Code
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P0139
P0139
Diagnosis information - DME V6 DFI
Oxygen sensor signal downstream of catalytic converter, bank 1 - dynamic response Diagnostic conditions
- Engine running
- Mass air flow between 28 kg/h and 120 kg/h (partial load) for 2 minutes
- Lambda control after catalytic converter active (basic adaptation settled)
- No secondary air diagnosis
- no tank ventilation diagnosis
- no high loading of activated carbon filter
- no faults of lambda control or oxygen sensor stored
Possible fault causes
- Oxygen sensor faulty