P2297: O2 Sensor Out of Range During Deceleration (Bank 1 Sensor 1)
Standardized SAE J2012 code · P22xx — Fuel & air metering and auxiliary emission controls
What does P2297 mean?
During engine deceleration with closed throttle (DFCO), the O2 sensor on bank 1 sensor 1 should swing fully lean as the manifold fills with fresh air. Code is set when the swing does not happen — usually a slow or coated sensor.
The code tells you which monitor failed, not which part is broken. Test before replacing parts.
Symptoms
- Check engine light on
- Increased fuel consumption
- Possible rough idle or hesitation
- Failed emissions test
Common causes
- High Sensor slow or coated
Likelihood is a general estimate across vehicles; your make and model may differ.
Add your car to see reports of P2297 on the same make and model first.
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