Code result
P22A6
NOx Sensor Heater Sense Circuit
High severity
What it means
NOx Sensor Heater Sense Circuit (Bank 1 Sensor 2): an electrical fault is present in the circuit. The NOx sensor heater brings the sensor to operating temperature; a fault delays accurate NOx readings used for SCR control.
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
Sense circuit failed
highOne of the most commonly reported causes for this code — check this first.
Related help
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