NOx Sensor Circuit Intermittent (Bank 2)
What does P2214 mean?
The P2214 code means the vehicle's onboard diagnostic system has detected: NOx Sensor Circuit Intermittent (Bank 2). This is a low severity code.
Common Symptoms
- Intermittent Check Engine Light
- Sporadic SCR system warnings
- Occasional reduced power events
- Inconsistent Bank 2 NOx readings
- Periodic emissions faults
Probable Causes (Ranked by Likelihood)
- Loose connection at the Bank 2 NOx sensor connector Very High
- Chafed or partially broken wiring in the Bank 2 harness High
- NOx sensor beginning to fail internally Moderate
- Vibration-related contact issues on Bank 2 wiring Moderate
- Corroded ECM connector pins for the Bank 2 circuit Low
Step-by-Step Diagnostic Procedure
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Wiggle test the Bank 2 NOx sensor connector while monitoring live data
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Inspect the entire Bank 2 wiring harness for chafing or partial breaks
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Check connector pins for corrosion or looseness
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Monitor Bank 2 NOx readings during a road test for intermittent dropouts
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Replace the sensor if wiring checks all pass
Frequently Asked Questions
Why does the Bank 2 NOx sensor code appear intermittently?
Intermittent codes usually point to a connection issue -- a loose connector, chafed wire, or corroded pin that only causes a fault under certain conditions like vibration or temperature changes.
Is an intermittent code less serious than a constant code?
It is generally less urgent, but the underlying issue will likely worsen over time. Diagnosing it early can prevent a more expensive repair later.
Can road salt cause intermittent NOx sensor issues?
Yes, road salt and moisture can corrode sensor connectors and wiring, especially on the underside of the vehicle where these sensors are located, leading to intermittent faults.