Generac

HIGH-BACKPRESSURE ALARM

UnclassifiedLubrication

What This Code Means

Soot buildup; High-backpressure alarm triggers

Possible Causes

  • •Low-duty standby installations
  • •Infrequent operation
  • •Exhaust temperatures failing to reach levels needed for passive regeneration

Suggested Actions

  1. 1Perform a forced regeneration cycle (requires 30-45 minutes uninterrupted)
  2. 2Exercise the unit under at least 50% load for 30 minutes weekly
  3. 3Perform periodic DPF ash cleaning every 3,000-5,000 hours
  4. 4Monitor DPF differential pressure at each service visit

Related Generac Fault Codes

LOW OIL PRESSUREP0134F5F4F3F1E-CODEBATTERY CHARGER AC FAILURE ALARM420442000035033217
Browse all Generac fault codes

ASK RUDY ABOUT THIS FAULT

Get a diagnosis walkthrough for HIGH-BACKPRESSURE ALARM on your specific Generac unit — cited to the OEM manual, not a forum guess.

TRY IT FREE