P2298
O2 Sensor Out of Range During Deceleration Bank 2 Sensor 1
Fuel & air metering (O2 sensor)
Generic OBD-II
Medium
What it means
P2298 means the upstream oxygen sensor on Bank 2 (Sensor 1) gave a reading outside the expected range while the vehicle was decelerating. It usually points to a lazy or failing sensor, an exhaust leak near the sensor, or a wiring/mixture problem. The car typically still drives fine, but fuel trims and emissions accuracy are affected until it's fixed.
Medium
Can I keep driving? Yes — the car drives normally, but fuel trims and emissions may be off; have it looked at before an emissions test.
Common symptoms
What you'll notice
- Check-engine light on
- Possible slightly rough running or hesitation
- Higher fuel consumption
- Fails an emissions readiness check
Common causes
Most likely first
- Faulty upstream O2 sensor, Bank 2 Sensor 1Likely
- Exhaust leak near the Bank 2 upstream sensorCommon
- O2 sensor wiring or connector faultCommon
- Fuel-pressure or fuel-trim issue skewing sensor readingsLess often
- Vacuum or intake leak affecting Bank 2 mixtureLess often
How to diagnose & fix
Work through it in order
- Read freeze-frame and live O2 data, watching the sensor during deceleration.
- Check for exhaust leaks upstream of the Bank 2 Sensor 1 sensor.
- Inspect the B2S1 sensor connector and wiring for damage or corrosion.
- Review fuel trims for a persistent lean or rich bias.
- Replace the sensor if it responds slowly or reads out of range, then clear and re-test.
FAQ
Quick answers
Is it safe to drive with P2298?+
Yes — the car generally drives normally. The concern is emissions and fuel-trim accuracy, so have it diagnosed before an emissions test.
Can I just clear P2298?+
It returns after a few deceleration events if the sensor or the underlying mixture issue isn't fixed.
Related codes
Often seen with P2298
Read & clear P2298 yourself
Scan your car, confirm the code, and clear it once it's fixed — with OBD DashX on your phone.
✓ Verified name — SAE J2012 / ISO 15031-6Guidance reviewed by OBD DashX