Code result
P2204
NOx Sensor Circuit Intermittent
High severity
What it means
The bank 1 NOx sensor signal drops out intermittently. Typical cause is a marginal connector, harness chafing near hot exhaust components, or thermal-cycling solder joints inside the smart sensor.
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
Connector intermittent contact
highOne of the most commonly reported causes for this code — check this first.
Harness chafed near exhaust
mediumA plausible cause — test and verify before replacing parts.
Connector with intermittent contact under vibration
lowLess common, but worth ruling out after the more likely causes.
Related help
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