P2215 moderate

NOx Sensor Heater Circuit (Bank 2)

The P2215 code means the vehicle's onboard diagnostic system has detected: NOx Sensor Heater Circuit (Bank 2). This is a moderate severity code.

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Keep driving?: Yes, but fix soon
DIY difficulty: hard
Estimated cost: $250 - $800 (parts and labor)

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Common Symptoms

Check Engine Light on
Slow Bank 2 sensor warm-up
Failed emissions test
Temporary reduced power on cold start
Elevated cold-start NOx emissions

Probable Causes (Ranked by Likelihood)

Failed NOx sensor heater element on Bank 2 Very High
Open or short in the Bank 2 heater circuit wiring High
Blown fuse for the Bank 2 NOx sensor heater Moderate
Poor ground connection for the Bank 2 heater circuit Moderate
ECM Bank 2 heater driver failure Low

Step-by-Step Diagnostic Procedure

Check the Bank 2 NOx sensor heater fuse
Measure heater circuit resistance at the Bank 2 sensor connector
Verify power and ground at the connector with key on
Inspect wiring for opens or shorts between the ECM and Bank 2 sensor
Replace the Bank 2 NOx sensor if the internal heater has failed

Frequently Asked Questions

Is P2215 the Bank 2 version of P2205?

Yes, P2205 covers the Bank 1 NOx sensor heater circuit and P2215 covers the Bank 2 NOx sensor heater circuit. The diagnostic approach is identical but on the opposite bank.

Can I drive without the Bank 2 NOx heater working?

You can drive, but the Bank 2 NOx sensor will take much longer to reach operating temperature, and the SCR system will not function properly during that time. You will also fail emissions tests.

Should I check the fuse before replacing the sensor?

Absolutely. A blown fuse is the cheapest possible fix and should always be checked first. If the fuse is blown, also investigate why it blew before simply replacing it.