21 23

UnclassifiedGeneral

What This Code Means

Malfunction Indicator Lamp (MIL) ON during active fault; Limited operation; Forced idle; Engine shutdown

Possible Causes

  • FPP voltage < 0.2 volts
  • FPP1/FPP2 voltage is lower than the limit defined in the engine calibration

Related Power Solutions International Fault Codes

ASK RUDY ABOUT THIS FAULT

Get a diagnosis walkthrough for 21 23 on your specific Power Solutions International unit — cited to the OEM manual, not a forum guess.

TRY IT FREE