OBD-II code · Powertrain (generic, extended)
P22BE O2 Sensor Reference Voltage Circuit High (Bank 2 Sensor 2)
O2 reference voltage on bank 2 sensor 2 above upper plausibility — short to B+. A drifted or sluggish lambda sensor lets the mixture run lean or rich without correction — fuel economy and emissions suffer immediately.
Is it safe to drive with P22BE?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelyShort to B+
- Less likelyConnector pins corroded - high contact resistance
- Less likelySupply wire pinched against B+ source
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
- P2246O2 Sensor Reference Voltage Circuit High (Bank 1 Sensor 1)
- P2250O2 Sensor Reference Voltage Circuit High (Bank 2 Sensor 1)
- P22B1O2 Sensor Reference Voltage Circuit High (Bank 1 Sensor 2)
- P22BBO2 Sensor Reference Voltage Circuit/Open (Bank 2 Sensor 2)
- P22BCO2 Sensor Reference Voltage Performance (Bank 2 Sensor 2)
- P22BDO2 Sensor Reference Voltage Circuit Low (Bank 2 Sensor 2)
- P22BFO2 Sensor Negative Current Control Circuit/Open (Bank 2 Sensor 2)
- P22C0O2 Sensor Negative Current Control Circuit Low (Bank 2 Sensor 2)
- P22C1O2 Sensor Negative Current Control Circuit High (Bank 2 Sensor 2)
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.