OBD-II code · Powertrain (generic, extended)
P22B5 O2 Sensor Pumping Current Trim Circuit/Open (Bank 1 Sensor 2)
The pumping current trim line on bank 1 sensor 2 is open. The trim is the per-sensor calibration code that adjusts pumping current to compensate for production tolerances.
Is it safe to drive with P22B5?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelyOpen trim 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
- P22C2O2 Sensor Pumping Current Trim Circuit/Open (Bank 2 Sensor 2)
- P22B2O2 Sensor Negative Current Control Circuit/Open (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)
- P22B6O2 Sensor Pumping Current Trim Circuit Low (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)
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.