OBD-II code · Powertrain (generic, extended)
P2274 O2 Sensor Signal Biased/Stuck Lean (Bank 1 Sensor 3)
O2 Sensor Signal Biased/Stuck Lean (Bank 1 Sensor 3): the control module has detected this fault condition.
Is it safe to drive with P2274?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelySensor aged or contaminated
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
- P2276O2 Sensor Signal Biased/Stuck Lean (Bank 2 Sensor 3)
- P2271O2 Sensor Signal Stuck Rich (Bank 1, Sensor 2)
- P2272O2 Sensor Signal Stuck Lean (Bank 2, Sensor 2)
- 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)
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.