P2214 low

NOx Sensor Circuit Intermittent (Bank 2)

The P2214 code means the vehicle's onboard diagnostic system has detected: NOx Sensor Circuit Intermittent (Bank 2). This is a low severity code.

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Keep driving?: Yes, but fix soon
DIY difficulty: hard
Estimated cost: $100 - $800 (parts and labor)

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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

Wiggle test the Bank 2 NOx sensor connector while monitoring live data
Inspect the entire Bank 2 wiring harness for chafing or partial breaks
Check connector pins for corrosion or looseness
Monitor Bank 2 NOx readings during a road test for intermittent dropouts
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.