P2252O2 Sensor Negative Current Control Circuit Low (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
- P2252 means the negative current control side of the bank 1 front air-fuel sensor reads too low, typically because that line or the sensor cell is shorted to ground. GM's tables for the Honda-built 3.5 V6 in the Saturn Vue (L66, 2004-05) describe it as a sensor-cell short: once the engine has run for 85 s with the heater working and the element signal between 3.2 and 4.6 V, a sensor-cell voltage under 0.3 V for 0.5 s stores the code in the first drive cycle; P2255 is the bank 2 twin. Mitsubishi's 2022 Outlander service manual update lists P2252 as a two-trip code, and GM's 2018 Duramax table 18OBDG04 counts it among faults that invalidate the front sensor signal. Ford instead books such shorts as P0131. P2251 is the open line, P2253 the high fault.
- What you may notice
- Check engine light
- Higher fuel consumption from open-loop fuelling on bank 1
- Possible hesitation or uneven running
- Likely causes
- LikelyReference ground or sensor-cell wire shorted to ground (chafed against exhaust or body)
- PossibleInternal short in the air-fuel sensor
- RareFault in the sensor interface of the ECM
- 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 – €400
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.