O2 Sensor Reference Voltage Performance (Bank 2 Sensor 2)
O2 sensor reference voltage on bank 2 sensor 2 is in range but plausibility check fails — drift or instability.
Affected components
- Oxygen sensor
Common causes
- High likelihood: Reference voltage drift
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.