BACK-PRESSURE FAULT

UnclassifiedFuel

What This Code Means

Derate warning; Progressive power derate; Regen warning; Power derate; Reduced power; Excessive smoke; Turbo whine; Injector fouling; Filter clogging

Possible Causes

  • •DEF system (SCR) failure
  • •DPF (Diesel Particulate Filter) failure
  • •Turbocharger failure
  • •Poor fuel quality
  • •Sustained high load

ASK RUDY ABOUT THIS FAULT

Get a diagnosis walkthrough for BACK-PRESSURE FAULT on your specific Multiquip unit — cited to the OEM manual, not a forum guess.

GET THE ANSWER

Free account required — we'll bring your question with you.