P22A4

Nitrogen oxides (NOx) sensor 2, bank 1, heater control – circuit low

DTC P22A4, sometimes indicated as P22A400 is an OBD diagnostic trouble code indicating a manufacturer-specific fault with the vehicle powertrain (i.e. engine and gearbox). This code identifies an error with the air/fuel mixture causing nitrogen oxides (nox) sensor 2, bank 1, heater control – circuit low.

  • P22A4: Nitrogen oxides (NOx) sensor 2, bank 1, heater control – circuit low
  • P22A4 00: Nitrogen oxides (NOx) sensor 2, bank 1, heater control - circuit low

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