OBD-II code · Powertrain (generic, extended)
P22C0 O2 Sensor Negative Current Control Circuit Low (Bank 2 Sensor 2)
O2 negative current line on bank 2 sensor 2 stuck low — short to ground. 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 P22C0?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelyShort to ground
- Less likelyConnector pins corroded - high contact resistance
- Less likelyHarness chafing through insulation
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
- P2252O2 Sensor Negative Current Control Circuit Low (Bank 1 Sensor 1)
- P2254O2 Sensor Negative Current Control Circuit Low (Bank 2 Sensor 1)
- P22B3O2 Sensor Negative Current Control Circuit Low (Bank 1 Sensor 2)
- P22BDO2 Sensor Reference Voltage Circuit Low (Bank 2 Sensor 2)
- P22BEO2 Sensor Reference Voltage Circuit High (Bank 2 Sensor 2)
- P22BFO2 Sensor Negative Current Control Circuit/Open (Bank 2 Sensor 2)
- P22C1O2 Sensor Negative Current Control Circuit High (Bank 2 Sensor 2)
- P22C2O2 Sensor Pumping Current Trim Circuit/Open (Bank 2 Sensor 2)
- P22C3O2 Sensor Pumping Current Trim Circuit Low (Bank 2 Sensor 2)
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.