Code result
P224B
NOx Sensor Heater Resistance
High severity
What it means
The measured heater element resistance of the NOx sensor on bank 1 sensor 2 is outside the calibrated range. Used as a sensor-element health check.
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
Heater element aged
highOne of the most commonly reported causes for this code — check this first.
Related help
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