Code result
P22A1
NOx Sensor Circuit High
High severity
What it means
NOx Sensor Circuit High (Bank 1 Sensor 2): the signal voltage is above the expected range. Often an open circuit or a short to supply voltage.
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
Open signal line
highOne of the most commonly reported causes for this code — check this first.
Connector pins corroded - high contact resistance
lowLess common, but worth ruling out after the more likely causes.
Supply wire pinched against B+ source
lowLess common, but worth ruling out after the more likely causes.
Related help
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