Powertrain, generic (extended)

P2252 O2 Sensor Negative Current Control Circuit Low (Bank 1 Sensor 1)

Check engine lightOn
EmissionsRelevant
Drive cycleRequired
Limp modeNo

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.

Likely causes

Reference ground or sensor-cell wire shorted to ground (chafed against exhaust or body)
Internal short in the air-fuel sensor
Fault in the sensor interface of the ECM

Symptoms

  • Check engine light
  • Higher fuel consumption from open-loop fuelling on bank 1
  • Possible hesitation or uneven running

Repair estimate

DifficultyMediumDIY possible
Parts and labour€80–400
Time0.5–2 h

Typical range across vehicles; the real cost depends on what the testing finds.

Parts involved

oxygen sensor bank1 sensor1oxygen sensor wiringecm

Related codes

P2251P2253P2255P2245P0131

References: gsi.ext.gm.com, gsi.ext.gm.com, static.nhtsa.gov, gsi.ext.gm.com.