N/A

UnclassifiedSpeed

What This Code Means

Blue smoke; Power loss; Wet stacking; Isochronous governor fault codes; Cranking failure

Possible Causes

  • Turbocharger oil seal failure
  • High operating hours
  • Extended low-load operation
  • CAN bus interference
  • Harness issues
  • Extended standby
  • Battery Cold Cranking Amps (CCA) dropped below 80% of rated capacity

Suggested Actions

  1. 1Run monthly load tests at 50%+ capacity
  2. 2Check harness routing
  3. 3Check connector integrity at annual service
  4. 4Perform battery load test at each service interval
  5. 5Replace battery

ASK RUDY ABOUT THIS FAULT

Get a diagnosis walkthrough for N/A on your specific MTU unit — cited to the OEM manual, not a forum guess.

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