P0139

P0139

Oxygen Sensor Behind Catalytic Converter, Dynamism

NOTE: The catalytic converter is filled with oxygen during the thrust phase, the oxygen sensor behind the catalytic converter should recognize a lean mixture. If this is not carried out in an appropriate amount of time, the oxygen sensor is determined to be inert.

Diagnostic conditions
- Thrust phase for a minimum of 5 seconds
- Oxygen sensors behind catalytic converter ready for operation
- Basic adaptation stabilized
- No other oxygen-sensor faults

Possible fault causes
- Oxygen sensor faulty (dynamically inert)