P2414

O2 Sensor Exhaust Sample Error Bank 1 Sensor 1

Q: Is it safe to drive with P2414?

Short-term yes, but because this upstream sensor controls fuel mixture, leaving it can hurt economy and, over time, the catalytic converter. Fix it soon.

Q: Can I just clear P2414?

It returns within a few drive cycles unless the sensor, its wiring, or a nearby exhaust leak is actually repaired.

Fuel & air metering (oxygen sensor) Generic OBD-II Medium

What it means

P2414 means the upstream oxygen sensor on bank 1 (before the catalytic converter) is not getting a proper exhaust sample, so its readings are unreliable. Because this sensor controls the fuel mixture, the engine can idle rough, surge, or use more fuel. Common causes are a failing sensor, damaged wiring or connector, or an exhaust leak near the sensor letting in outside air.

Medium

Can I keep driving? Usually yes, but the upstream sensor drives fuel trim, so you may notice rough idle, surging, or poorer economy until it is fixed.

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
Rough or unstable idle
Engine surge or hesitation
Higher fuel consumption

Common causes

Most likely first

Faulty upstream oxygen sensor (bank 1, sensor 1)Likely
Open, shorted, or corroded wiring or connector at the sensorCommon
Exhaust leak near the sensor drawing in outside airCommon
Sensor contaminated by oil, coolant, or moistureLess often
Poor sample flow from a plugged sensor port or damaged bungLess often

How to diagnose & fix

Work through it in order

Read freeze-frame data and confirm the code is bank 1, sensor 1 (upstream, on the bank with cylinder 1).
Inspect the sensor's wiring and connector for damage, corrosion, or a loose pin.
Check for exhaust leaks near the sensor and repair them first.
Compare the sensor's live signal against a known-good sensor; replace it if it fails to switch correctly.
Clear the code and re-test over a full drive cycle.

FAQ

Quick answers

Is it safe to drive with P2414?+

Short-term yes, but because this upstream sensor controls fuel mixture, leaving it can hurt economy and, over time, the catalytic converter. Fix it soon.

Can I just clear P2414?+

It returns within a few drive cycles unless the sensor, its wiring, or a nearby exhaust leak is actually repaired.

Read & clear P2414 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