OBD-II code · Powertrain (generic, extended)
P2254 O2 Sensor Negative Current Control Circuit Low (Bank 2 Sensor 1)
Bank 2 counterpart to P2252. The Vs negative line on the wide-band oxygen sensor at bank 2, sensor 1 is below the lower threshold.
Is it safe to drive with P2254?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelyVs negative line shorted to ground
- PossibleNernst cell return open inside sensor
- Less likelyConnector pins corroded - high contact resistance
Symptoms
- Check engine light on
- Increased fuel consumption
- Possible rough idle or hesitation
- Failed emissions test
Repair at a glance
- Difficulty
- Medium
- DIY friendly
- Often, with basic tools
- Typical labour
- 0.5–2 h
- Emissions test
- Likely to fail
- After the fix
- A drive cycle is needed before the light stays off
- Parts involved
- Oxygen Sensor Upstream B2, Oxygen Sensor Wiring
Related codes
- P2252O2 Sensor Negative Current Control Circuit Low (Bank 1 Sensor 1)
- P22B3O2 Sensor Negative Current Control Circuit Low (Bank 1 Sensor 2)
- P22C0O2 Sensor Negative Current Control Circuit Low (Bank 2 Sensor 2)
- P2251O2 Sensor Negative Current Control Circuit (Bank 1 Sensor 1)
- P2253O2 Sensor Negative Current Control Circuit High (Bank 1 Sensor 1)
- P2255O2 Sensor Negative Current Control Circuit High (Bank 2 Sensor 1)
- P2256O2 Sensor Heater Control Circuit Low Bank 1 Sensor 2
- P2257Secondary Air Injection System Control A Circuit Low
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.