OBD-II code · Powertrain (generic, extended)
P22B2 O2 Sensor Negative Current Control Circuit/Open (Bank 1 Sensor 2)
The negative (sinking) side of the O2 sensor pumping current control circuit on bank 1 sensor 2 is open.
Is it safe to drive with P22B2?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelyOpen negative 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
- P22BFO2 Sensor Negative Current Control Circuit/Open (Bank 2 Sensor 2)
- P22AFO2 Sensor Reference Voltage Performance (Bank 1 Sensor 2)
- P22B0O2 Sensor Reference Voltage Circuit Low (Bank 1 Sensor 2)
- P22B1O2 Sensor Reference Voltage Circuit High (Bank 1 Sensor 2)
- P22B3O2 Sensor Negative Current Control Circuit Low (Bank 1 Sensor 2)
- P22B4O2 Sensor Negative Current Control Circuit High (Bank 1 Sensor 2)
- P22B5O2 Sensor Pumping Current Trim Circuit/Open (Bank 1 Sensor 2)
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.