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Home / Generac / 1511

Evolution 1.0 / 2.0

1511

RPM sensor loss, single cylinder running

Engine · Alarm

Alarm 1511 is RPM sensor loss on a single-cylinder set that was running. The e-code table lists an air pocket in the fuel line, dirty fuel, or loss of the ignition pulse.

Seen on: Air-cooled home standby generators with an Evolution 1.0 or 2.0 controller.

Likely causes

  • Fuel interruption that stalls the engine.
  • Loss of the ignition pulse the controller uses as RPM.

Checks an owner can do

  1. Check that fuel is on and the LP tank is not empty.
  2. Record the load that was running when it stalled.

When to call a pro

If fuel is available and 1511 returns, a technician needs to trace the ignition pulse and why the engine stalled.

Source

Generac Diagnostic Repair Manual 10000041488 (Evolution 1.0/2.0 air-cooled). E-code rows below match that manual's alarm table as published by Home Generators for Sale and the manual text extracted from document 10000041488.

Wording follows that document. Firmware can change a threshold. If this page and the manual shipped with your unit disagree, follow the manual.

What fixed mine

No approved reports for this code yet. Send one. It stays in the review queue until it is approved.

Related Generac codes

https://generatorcodes.com/brand/generac/1511