Powertrain
generic / SAE
P2297
O2 Sensor Out of Range During Deceleration (Bank 1 Sensor 1)
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.
SystemPowertrain
Typegeneric / SAE
GroupP2
Range / number2 / 97
Possible causes
- Sensor slow or coated 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