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Nitrogen Oxide (NOx) Sensor Replacement

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  1. Nitrogen Oxide (NOx) Sensor diagnostic guides

    Trouble codes that commonly point to this part — click any code for the full diagnostic walk-through.

    P1289 OBD-II Code P1289: Cylinder Head Temperature Sensor Circuit High P2000 OBD-II Code P2000: NOx Trap Efficiency Below Threshold P0420 OBD-II Code P0420: Catalyst System Efficiency Below Threshold (Bank 1) P1288 Ultimate P1288 Guide: Beyond the Basics for a First-Time Fix P2200 OBD-II Code P2200: NOx Sensor Circuit Malfunction (Bank 1) P2209 OBD-II Code P2209: NOx Sensor Heater Sense Circuit Range/Performance P0421 OBD-II Code P0421: Warm-Up Catalyst Efficiency Below Threshold U0001 OBD-II Code U0001: High-Speed CAN Communication Bus P2203 OBD-II Code P2203: NOx Sensor Circuit High Input Bank 1 P0133 OBD-II Code P0133: Oxygen Sensor Slow Response

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