OBD-II code · Powertrain (generic, extended)
P22B8 O2 Sensor Positive Current Control Circuit/Open (Bank 2 Sensor 2)
The positive (sourcing) side of the O2 sensor pumping current control circuit on bank 2 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 P22B8?
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
- P22ABO2 Sensor Positive Current Control Circuit/Open (Bank 1 Sensor 2)
- P22B5O2 Sensor Pumping Current Trim Circuit/Open (Bank 1 Sensor 2)
- P22B6O2 Sensor Pumping Current Trim Circuit Low (Bank 1 Sensor 2)
- P22B7O2 Sensor Pumping Current Trim Circuit High (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)
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.