Powertrain
generic / SAE
P2274
O2 Sensor Signal Biased/Stuck Lean (Bank 1 Sensor 3)
O2 sensor at bank 1 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.
SystemPowertrain
Typegeneric / SAE
GroupP2
Range / number2 / 74
Possible causes
- Sensor aged or contaminated high
Symptoms
- Check engine light on
- Increased fuel consumption
- Possible rough idle or hesitation
- Failed emissions test
Inspection / repair
- Difficulty: medium
- DIY: possible
- Estimated cost: 80–500 €
- Estimated time: 0.5–2.5 h
- Component: oxygen sensor
- MIL / check engine light
- emissions-relevant
Sources
References
sae:J2012