The codes related to a NOx sensor depend on the make and model of the vehicle and the specific diagnostic system used. Here are some common codes that may indicate a faulty NOx sensor:

  • P2202: NOx Sensor Circuit Low Input
  • P2203: NOx Sensor Circuit High Input
  • P2204: NOx Sensor Circuit Intermittent Input
  • P2205: NOx Sensor Circuit
  • P2206: NOx Sensor Signal Biased/Stuck Lean
  • P2207: NOx Sensor Signal Biased/Stuck Rich
  • P229F: NOx Sensor Circuit Range/Performance Bank 1
  • P22A0: NOx Sensor Circuit Bank 1

These codes can indicate various issues with the NOx sensor or its wiring, and a diagnostic scan by a professional mechanic is usually necessary to determine the exact cause of the problem.

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