OBD-II code · Powertrain (generic, extended)
P2255 O2 Sensor Negative Current Control Circuit High (Bank 2 Sensor 1)
Bank 2 counterpart to P2253. The Vs negative line on bank 2, sensor 1 reads above the upper threshold.
Is it safe to drive with P2255?
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 positive
- PossibleInternal short in 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
- P2253O2 Sensor Negative Current Control Circuit High (Bank 1 Sensor 1)
- P2254O2 Sensor Negative Current Control Circuit Low (Bank 2 Sensor 1)
- P22B4O2 Sensor Negative Current Control Circuit High (Bank 1 Sensor 2)
- P22C1O2 Sensor Negative Current Control Circuit High (Bank 2 Sensor 2)
- P2252O2 Sensor Negative Current Control Circuit Low (Bank 1 Sensor 1)
- P2256O2 Sensor Heater Control Circuit Low Bank 1 Sensor 2
- P2257Secondary Air Injection System Control A Circuit Low
- P2258Secondary Air Injection System Control A Circuit High
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.