P223DO2 Sensor Pumping Current Range/Performance (Bank 2)
- 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
- 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.
- What you may notice
- Check engine light after two drives
- Often no driveability complaint
- Likely causes
- LikelyWorn bank 2 wide-band sensor that no longer pumps correctly in air
- PossibleInterrupted pump-current or reference circuit of the bank 2 sensor
- RareSensor heater too weak to keep the element at temperature
- 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: €90 – €450
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.