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GENERATORCODES

Home / Generac / 1300

Evolution 1.0 / 2.0

1300

Low oil pressure

Engine · Alarm

Alarm 1300 is low oil pressure while the generator is running. The Evolution table calls it the default extended alarm for low oil pressure and says to check oil level and pressure. It is not the overspeed alarm. Overspeed on this controller is 1200, 1205, or 1207. The diagnostic manual's protection section labels the low oil pressure shutdown as E-Code 1300.

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

Likely causes

  • Oil level is low, which is common after a long outage.
  • The low-oil-pressure switch is faulty even though the level is correct.
  • The engine is not actually building oil pressure.

Checks an owner can do

  1. With the engine off and cool, check the oil on the dipstick. Fill only to the full mark with the oil your model manual specifies. Do not overfill.
  2. Look under the unit for an obvious leak.
  3. Do not keep restarting a low-oil shutdown to finish an exercise.

When to call a pro

If the level is correct and 1300 returns, the switch, its wiring, or true oil pressure needs a pressure test. That test is in the service manual, not a driveway guess.

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/1300