OBD-II code · Powertrain (generic, extended)
P22BA O2 Sensor Positive Current Control Circuit High (Bank 2 Sensor 2)
O2 positive current line on bank 2 sensor 2 stuck high — 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 P22BA?
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
- P22ADO2 Sensor Positive Current Control Circuit High (Bank 1 Sensor 2)
- P22B7O2 Sensor Pumping Current Trim Circuit High (Bank 1 Sensor 2)
- P22B8O2 Sensor Positive Current Control Circuit/Open (Bank 2 Sensor 2)
- P22B9O2 Sensor Positive Current Control Circuit Low (Bank 2 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)
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.