O2 Sensor Pumping Current Range/Performance (Bank 2)
The pumping current of the wide-band O2 sensor on bank 2 is in electrical range but plausibility check fails. Wide-band sensors use a pumping cell that adjusts oxygen concentration in a reference chamber; the current required is proportional to lambda.
Affected components
- Oxygen sensor
Common causes
- High likelihood: Pumping cell aged
- Low likelihood: Sensor element aged beyond calibration window
- Low likelihood: Sensor mounting loose - signal damping
Possible symptoms
- Check engine light on
- Increased fuel consumption
- Possible rough idle or hesitation
- Failed emissions test
Diagnostic notes
- The malfunction indicator lamp may illuminate
- This code can affect emissions
Related codes
Sources
Diagnostic information is provided for reference only. Confirm the code with a compatible scan tool and follow the vehicle manufacturer's service procedures before replacing components.