Code result
P223F
O2 Sensor Reference Resistance Out Of Range
High severity
What it means
The reference resistance of the wide-band O2 sensor on bank 2 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?
No — stop driving
This code points to a problem that can cause damage or affect safety. Avoid driving and have the vehicle diagnosed promptly.
Most likely causes
Sensor element aged or contaminated
highOne of the most commonly reported causes for this code — check this first.
Related help
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