OBD-II code · Powertrain (generic, extended)
P22AD O2 Sensor Positive Current Control Circuit High (Bank 1 Sensor 2)
O2 positive current line on bank 1 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 P22AD?
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
- P22ABO2 Sensor Positive Current Control Circuit/Open (Bank 1 Sensor 2)
- P22BAO2 Sensor Positive Current Control Circuit High (Bank 2 Sensor 2)
- P22AANOx Sensor Heater Sense Circuit Intermittent (Bank 1 Sensor 2)
- P22ACO2 Sensor Positive Current Control Circuit Low (Bank 1 Sensor 2)
- P22AEO2 Sensor Reference Voltage Circuit/Open (Bank 1 Sensor 2)
- P22AFO2 Sensor Reference Voltage Performance (Bank 1 Sensor 2)
- P22B0O2 Sensor Reference Voltage Circuit Low (Bank 1 Sensor 2)
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.