OBD-II code · Powertrain (generic, extended)
P223E O2 Sensor Reference Resistance Out Of Range (Bank 1)
The reference resistance of the wide-band O2 sensor on bank 1 is outside the calibrated range — used by the controller to set the operating point of the pumping cell. Drift here indicates sensor element ageing or contamination.
Is it safe to drive with P223E?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelySensor element aged or contaminated
Symptoms
- Check engine light on
- Increased fuel consumption
- Possible rough idle or hesitation
- Failed emissions test
Repair at a glance
- Difficulty
- Medium
- DIY friendly
- Often, with basic tools
- Typical labour
- 0.5–2.5 h
- Emissions test
- Likely to fail
- Parts involved
- Oxygen Sensor
Related codes
- P223FO2 Sensor Reference Resistance Out Of Range (Bank 2)
- P223BReductant Heater F Control Circuit
- P223CO2 Sensor Pumping Current Range/Performance (Bank 1)
- P223DO2 Sensor Pumping Current Range/Performance (Bank 2)
- P2240O2 Sensor Pumping Current Circuit (Bank 2 Sensor 1)
- P2241O2 Sensor Pumping Current Circuit Low (Bank 2 Sensor 1)
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.