NOx Sensor Circuit Intermittent Bank 2

Where it lives

For P2217, the circuit described runs through the sensor. The description of P2217 puts it on bank 2.

Check these first

• An intermittent open in the bank 2 NOx signal wire
• A loose or corroded connector at the bank 2 NOx sensor
• A bank 2 NOx sensor that drops out once it reaches operating temperature
• Harness chafing against the exhaust or frame on the bank 2 side
• A weak ground at the bank 2 NOx sensor

What to do next

1. Wiggle test the bank 2 NOx harness while watching live data
2. Inspect the bank 2 sensor connector for corrosion or looseness
3. Watch bank 2 NOx live data through a warm-up cycle
4. Check the bank 2 sensor ground for voltage drop
5. Replace the bank 2 NOx sensor if the signal still cuts out
6. Clear the code and retest

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