Code result
P2200
NOx Sensor Circuit
High severity
What it means
The NOx sensor on bank 1 — typically upstream of the SCR catalyst — does not communicate or sends an invalid signal. NOx sensors are smart sensors with their own controller on the CAN bus; faults often involve heater failure or bus dropout.
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
NOx sensor failed
highOne of the most commonly reported causes for this code — check this first.
Sensor wiring or CAN harness open
mediumA plausible cause — test and verify before replacing parts.
Related help
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