O2 Sensor Circuit Slow Response

Diagnostic conditions 

• Air mass between 25^kg /_h and 120^kg /_h
• Oxygen sensing after catalytic converter is active
• Basic adaptation has reached steady condition
• No secondary air diagnosis
• No fuel tank ventilation diagnosis
• EVAP canister not highly loaded
• No other oxygen sensor faults

Possible cause of fault 

• Oxygen sensor faulty

Affected terminals 

None

Diagnosis/troubleshooting 

Fig 1: P0136 Work Instruction (O2 Sensor Circuit Slow Response)

Courtesy of PORSCHE OF NORTH AMERICA, INC.