P2298

O2 Sensor Out of Range During Deceleration Bank 2 Sensor 1

Q: 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.

Q: Can I just clear P2298?

It returns after a few deceleration events if the sensor or the underlying mixture issue isn't fixed.

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.

Real-world scan data

Seen in

scans in the past year

Found in

<0.1%

of scans

<0.1%

of scans that found faults

Figures reflect only diagnostic scans recorded through our own apps and tools. Cars are typically scanned because a symptom or warning light prompted it, so these counts describe our scan records — not the incidence of faults in any model, and not the quality, reliability, or safety of any vehicle. No comparison between manufacturers or models is implied. All trademarks belong to their respective owners; no affiliation or endorsement is implied.

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.

Read & clear P2298 yourself

Scan your car, confirm the code, and clear it once it's fixed — with OBD DashX on your phone.

▶ Get it on Google Play

✓ Verified name — SAE J2012 / ISO 15031-6Guidance reviewed by OBD DashX