NOx Sensor Heater Control Circuit High Bank 1 Sensor 1

Where it lives

For P2207, the sensor sits on the circuit this code reports. The description of P2207 puts it on bank 1.

Check these first

• A short to voltage on the bank 1 sensor 1 NOx heater control wire
• High resistance in the bank 1 sensor 1 NOx heater ground
• A failed bank 1 sensor 1 NOx heater element with high resistance
• A driver fault in the ECM for the bank 1 sensor 1 NOx heater

What to do next

1. Read bank 1 sensor 1 NOx heater status on a scan tool
2. Test the bank 1 sensor 1 NOx heater control wire for a short to voltage
3. Check the bank 1 sensor 1 NOx heater ground for high resistance
4. Measure the bank 1 sensor 1 NOx heater element resistance
5. Replace the bank 1 sensor 1 NOx sensor if the heater circuit tests good
6. Clear the code and retest

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