OBD-II code · Powertrain (generic, extended)
P2276 O2 Sensor Signal Biased/Stuck Lean (Bank 2 Sensor 3)
O2 sensor at bank 2 sensor 3 reports a lean reading suspiciously stable for too long. Sensor 3 is typically downstream of the second catalyst on systems with three-stage aftertreatment.
Is it safe to drive with P2276?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelySensor aged
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
- P2274O2 Sensor Signal Biased/Stuck Lean (Bank 1 Sensor 3)
- P2273O2 Sensor Signal Stuck Rich (Bank 2, Sensor 2)
- P2275O2 Sensor Signal Biased/Stuck Rich (Bank 1 Sensor 3)
- P2277O2 Sensor Signal Biased/Stuck Rich (Bank 2 Sensor 3)
- P2278O2 Sensor Signals Swapped Bank 1 Sensor 3 / Bank 2 Sensor 3
- P2279Intake Air System Leak
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.