Code result
P22FE
NOx Sensor Sensing Element Bank 1 Sensor 2
High severity
What it means
NOx Sensor Sensing Element Bank 1 Sensor 2: the control module has detected this fault condition.
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 poisoned by silicone, sulphur or oil ash
highOne of the most commonly reported causes for this code — check this first.
Thermal shock from condensate (cold start with wet exhaust)
mediumA plausible cause — test and verify before replacing parts.
Sensor at end of service life
mediumA plausible cause — test and verify before replacing parts.
Related help
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