P2253O2 Sensor Negative Current Control Circuit High (Bank 1 Sensor 1)
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Needs a drive cycle to confirm a fix
- How the car detects it
- P2253 reports that the negative current control side of the bank 1 upstream air-fuel sensor reads too high. On the Honda-built 3.5 V6 of the 2004-05 Saturn Vue (L66), GM's tables treat it as an open sensor-cell circuit: with the heater operating and the element signal above 4.6 V, a sensor-cell voltage over 6.0 V for 5 s sets it, and P2256 does the same on bank 2. A short to the heater or battery feed can drive the signal high in the same way. Mitsubishi lists P2253 as a two-trip code for the 2022 Outlander, and GM's 2018 Duramax table 18OBDG04 names it as a front sensor fault without giving limits. Ford logs high-side shorts on wide-band wires as P0132 instead. P2251 is the open ground line in Ford terms, P2252 the low fault.
- What you may notice
- Check engine light
- Higher fuel consumption from open-loop fuelling on bank 1
- Repeat failure of a new sensor if a wiring short remains
- Likely causes
- LikelyOpen sensor-cell wire or connector contact, letting the signal float high
- PossibleWire shorted to heater supply or battery voltage
- PossibleInternal defect in the air-fuel sensor
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Medium · Often possible to do yourself.Typical cost: €80 – €450
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.