P20C9

Reductant Control Module Requested MIL Illumination

DTC P20C9, sometimes indicated as P20C900 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 reductant control module requested mil illumination.

  • P20C9: Reductant Control Module Requested MIL Illumination
  • P20C9: Reductant control module – MIL activation requested
  • P20C9 00: Reductant control module - MIL activation requested

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