P2254

O2 Sensor Negative Current Control Circuit/Open Bank 2 Sensor 1

Q: Is it safe to drive with P2254?

Short-term usually, but with this circuit open the sensor can't measure mixture properly, so bank 2 fuel control and economy suffer and the converter can be affected over time. Repair it soon.

Q: Can I just clear P2254?

You can, but an open circuit will set it again immediately until the wiring or sensor is repaired.

O2 sensor Generic OBD-II Medium

What it means

P2254 means the ECM detects an open in the negative current control circuit for the bank 2, sensor 1 wide-band oxygen (air/fuel) sensor. This circuit is part of how the sensor measures mixture, so fuel control on that bank is affected. It's an electrical fault, usually an open wire, a bad connector, or a failed sensor rather than an engine problem.

Medium

Can I keep driving? The engine usually runs, but air-fuel control on bank 2 can be off; expect possible poor economy or rough running, and fix it to protect the catalytic converter.

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 uneven idle
Higher fuel consumption
Hesitation or surge

Common causes

Most likely first

Open in the negative current control circuit wiring (bank 2, sensor 1)Likely
Faulty wide-band air/fuel (O2) sensor, bank 2 sensor 1Common
Poor or corroded connector at the sensorCommon
PCM or sensor-driver fault (rare)Less often

How to diagnose & fix

Work through it in order

Read freeze-frame data, then inspect the bank 2 sensor 1 connector and wiring for an open in the negative current control circuit.
Check continuity and resistance of the circuit back to the PCM.
Test the air/fuel sensor per the service data.
Repair the open wiring or replace the sensor as indicated.
Clear the code and retest.

FAQ

Quick answers

Is it safe to drive with P2254?+

Short-term usually, but with this circuit open the sensor can't measure mixture properly, so bank 2 fuel control and economy suffer and the converter can be affected over time. Repair it soon.

Can I just clear P2254?+

You can, but an open circuit will set it again immediately until the wiring or sensor is repaired.

Read & clear P2254 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