Code result
P223C
O2 Sensor Pumping Current Range/Performance
High severity
What it means
The pumping current of the wide-band O2 sensor on bank 1 is in electrical range but plausibility check fails. Wide-band sensors use a pumping cell that adjusts oxygen concentration in a reference chamber; the current required is proportional to lambda.
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
Pumping cell aged
highOne of the most commonly reported causes for this code — check this first.
Sensor element aged beyond calibration window
lowLess common, but worth ruling out after the more likely causes.
Sensor mounting loose - signal damping
lowLess common, but worth ruling out after the more likely causes.
Related help
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