OBD-II code · Powertrain (generic, extended)
P22BC 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.
Is it safe to drive with P22BC?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelyReference voltage drift
Symptoms
- Check engine light on
- Increased fuel consumption
- Possible rough idle or hesitation
- Failed emissions test
Repair at a glance
- Difficulty
- Medium
- DIY friendly
- Often, with basic tools
- Typical labour
- 0.5–2.5 h
- Emissions test
- Likely to fail
- Parts involved
- Oxygen Sensor
Related codes
- P22AFO2 Sensor Reference Voltage Performance (Bank 1 Sensor 2)
- P22B9O2 Sensor Positive Current Control Circuit Low (Bank 2 Sensor 2)
- P22BAO2 Sensor Positive Current Control Circuit High (Bank 2 Sensor 2)
- P22BBO2 Sensor Reference Voltage Circuit/Open (Bank 2 Sensor 2)
- P22BDO2 Sensor Reference Voltage Circuit Low (Bank 2 Sensor 2)
- P22BEO2 Sensor Reference Voltage Circuit High (Bank 2 Sensor 2)
- P22BFO2 Sensor Negative Current Control Circuit/Open (Bank 2 Sensor 2)
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.