Powertrain, generic (extended)

P223D O2 Sensor Pumping Current Range/Performance (Bank 2)

Check engine lightOn
EmissionsRelevant
Drive cycleRequired
Limp modeNo

P223D applies the pump-current plausibility test to the front wide-band sensor of bank 2 on V engines. GM's 2016 and 2018 tables describe it for engines with a Continental interface chip: during a fuel cut-off window between 5 s and 12 s, a reading above 5.0 mA, within ±0.3 mA of zero, or below -0.10 mA is counted, and 40 hits in 160 samples in any window set the code as Type B. The test is skipped while bank 2 heater faults (P0050-P0052) or P0155 are active, because a cold element pumps poorly. The Bosch LSU 4.9 data sheet shows why the check works: pump current is zero at lambda 1, negative when rich and positive when lean, so air must give a clear positive value. P223C is the bank 1 version; P2240, P2247 and P2254 isolate open wires.

Likely causes

Worn bank 2 wide-band sensor that no longer pumps correctly in air
Interrupted pump-current or reference circuit of the bank 2 sensor
Sensor heater too weak to keep the element at temperature

Symptoms

  • Check engine light after two drives
  • Often no driveability complaint

Repair estimate

DifficultyMediumDIY possible
Parts and labour€90–450
Time0.5–2.5 h

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

Parts involved

oxygen sensor bank2 sensor1oxygen sensor wiringecm

Related codes

P223CP223FP2240P2247P2254P0155

References: gsi.ext.gm.com, gsi.ext.gm.com, bosch-motorsport.com, law.cornell.edu.