DTC P0140: O2 Sensor Circuit No Activity Detected: Diagnosis/troubleshooting

NOTE:

• Do not use contact spray on the oxygen sensor plug connections as this may cause irreparable damage to the wiring (contamination of the oxygen sensor via the reference air channel).

Fig 1: P0140 Work Instruction (Step 1)

Courtesy of PORSCHE OF NORTH AMERICA, INC.

Fig 2: Oxygen Sensor Oscilloscope Pattern

Courtesy of PORSCHE OF NORTH AMERICA, INC.

Fig 3: P0140 Work Instruction (Step 2 & 3)

Courtesy of PORSCHE OF NORTH AMERICA, INC.

Fig 4: P0140 Work Instruction (Step 4 Through 9)

Courtesy of PORSCHE OF NORTH AMERICA, INC.