Porsche Diagnostic Trouble Codes
OBD2 fault codes seen on Porsche vehicles, with what each code means, its typical repair cost range, and notes on specific Porsche models.
Emissions
O2 Sensor Circuit Malfunction (Bank 2, Sensor 1)
Porsche Boxster (986) • 1996-2004
The 986 Boxster's flat-six has four oxygen sensors: one before and one after the catalytic converter...
O2 Sensor Circuit Slow Response (Bank 2, Sensor 1)
Porsche Boxster (986) • 1996-2004
The 986 Boxster's flat-six has four oxygen sensors: one before and one after the catalytic converter...
O2 Sensor Circuit No Activity Detected (Bank 2, Sensor 1)
Porsche Boxster (986) • 1996-2004
The 986 Boxster's flat-six has four oxygen sensors: one before and one after the catalytic converter...
O2 Sensor Heater Circuit Malfunction (Bank 2, Sensor 1)
Porsche Boxster (986) • 1996-2004
The 986 Boxster's flat-six has four oxygen sensors: one before and one after the catalytic converter...
O2 Sensor Circuit Slow Response (Bank 2, Sensor 2)
Porsche Boxster • 2000-2008
Porsche's fault-code lists for the ME7.2 (986 Boxster from 2000) and ME7.8 (987 Boxster) engine comp...
O2 Sensor Heater Circuit Malfunction (Bank 2, Sensor 2)
Porsche Boxster • 2000-2008
Porsche's fault-code list for the ME7.8 engine computer (987 Boxster) includes P0161 for this heater...
Secondary Air Injection System Malfunction
Porsche Cayenne • 2003-2020
Early Cayenne models are known for secondary air injection faults. The pump and its check valves fai...
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