OBD-II code · Powertrain (generic, extended)
P22AB O2 Sensor Positive Current Control Circuit/Open (Bank 1 Sensor 2)
The positive (sourcing) side of the O2 sensor pumping current control circuit on bank 1 sensor 2 is open. Wide-band O2 sensors regulate oxygen concentration in a reference chamber by pumping current; the positive line is open here.
Is it safe to drive with P22AB?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelyOpen positive current line
- Less likelyPin pushed back out of connector body
- Less likelyCracked solder joint inside the module or sensor
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
- P22B8O2 Sensor Positive Current Control Circuit/Open (Bank 2 Sensor 2)
- P22A8NOx Sensor Heater Sense Circuit Low (Bank 1 Sensor 2)
- P22A9NOx Sensor Heater Sense Circuit High (Bank 1 Sensor 2)
- P22AANOx Sensor Heater Sense Circuit Intermittent (Bank 1 Sensor 2)
- P22ACO2 Sensor Positive Current Control Circuit Low (Bank 1 Sensor 2)
- P22ADO2 Sensor Positive Current Control Circuit High (Bank 1 Sensor 2)
- P22AEO2 Sensor Reference Voltage Circuit/Open (Bank 1 Sensor 2)
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.