P2415
O2 Sensor Exhaust Sample Error Bank 2 Sensor 1
Fuel & air metering (emissions)
Generic OBD-II
Medium
What it means
P2415 means the upstream oxygen sensor on Bank 2 (before the catalytic converter) is not sampling the exhaust correctly — often from a failing sensor, a nearby exhaust leak, or a restricted sample passage. The car usually still drives, but fueling accuracy and emissions monitoring suffer until it is repaired.
Medium
Can I keep driving? Usually drivable — the car may run slightly rich or lean, so fix it soon to keep fueling accurate and pass emissions.
Common symptoms
What you'll notice
- Check-engine light on
- Possible rough idle or hesitation
- Slightly higher fuel consumption
- May fail an emissions test
Common causes
Most likely first
- Failed or contaminated Bank 2 Sensor 1 (upstream) oxygen sensorLikely
- Exhaust leak near the upstream sensor letting outside air inCommon
- Corroded connector or damaged wiring at the sensorCommon
- Restricted or blocked sensor sample/reference passageLess often
- Genuine rich or lean condition upstream affecting the sampleLess often
How to diagnose & fix
Work through it in order
- Read freeze-frame data and check for related fuel-trim codes.
- Inspect the exhaust for leaks near the Bank 2 upstream sensor.
- Inspect the sensor connector and wiring for corrosion or damage.
- View live O2 data to confirm the sensor is not switching normally.
- Replace the Bank 2 Sensor 1 oxygen sensor if faulty, then clear and re-test.
FAQ
Quick answers
Is it safe to drive with P2415?+
Usually yes for short trips, but a bad upstream sensor can skew fueling, so repair it soon to protect economy and emissions.
Can I just clear P2415?+
It returns once the sensor sample fails again unless the sensor, wiring, or exhaust leak is fixed.
Related codes
Often seen with P2415
Read & clear P2415 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