Low Oil Pressure Shutdown
The GENERAC-1300 (Generac Evolution) diesel fault code means: Low Oil Pressure Shutdown. This is a critical severity code.
- Keep running?
- No — shut it down
- DIY difficulty
- easy
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What Are the Symptoms of GENERAC-1300?
- The generator shuts down with a red light and LOW OIL PRESSURE
What Causes GENERAC-1300? (Most Likely First)
- Low oil level from oil consumption Very Likely
- Oil leak Likely
- Missed routine maintenance Possible
Can I Keep Running It with GENERAC-1300?
No — shut it down. GENERAC-1300 is rated critical severity. Continuing to run the unit in this state risks further damage — get it looked at before putting it back in service.
Common Fixes by Vehicle
What techs usually find when diagnosing GENERAC-1300 on specific platforms — tap a platform for the fix and the exact part:
Generac Guardian / Protector 14-48kW Easy DIY
Code 1300 (Low Oil Pressure): Generac says it is typically low oil level from oil consumption, leaks or missed maintenance. Let the generator cool, check the dipstick, top up with the specified oil and look for leaks before buying parts. If the level is right and 1300 still trips within seconds of starting, the oil pressure switch ($25-$45, a short swap on the side of the block) is the next suspect. Confirm real pressure with a mechanical gauge before condemning the oil pump or bearings.
Labor: 15-30 minFrequently Asked Questions
What does Generac code 1300 mean?
Low oil pressure: the oil pressure sensor shut the generator down. Generac says this is typically low oil from consumption, leaks or missed maintenance.
Can I just clear it and restart?
Only after checking and refilling the oil. Generac's steps are: cool down, check and refill oil, look for leaks, then clear the alarm.
Mechanics Guide Step-by-step diagnosis
How Do You Diagnose GENERAC-1300?
Let the generator cool for at least 30 minutes.
Check the oil level and refill. Make sure the dipstick is fully inserted and the oil fill cap, drain cap and filter are hand-tight.
Look for visible oil leaks.
Clear the alarm and restart: on Evolution controllers press OFF, ENTER twice, then AUTO; on Power Zone 200 controllers hold OFF for 3 seconds. Never start the generator while it is under load.
If the code comes back after clearing it, Generac recommends a Generac Independent Authorized Service Dealer (IASD).
Sources 2
This page is built from documented references. Verify against your own service info before repair work.
- Generac Help Center, Low Oil Pressure (1300): Low oil pressure, error code 1300, red LED: "The low oil pressure sensor has triggered a shutdown due to inadequate oil levels." "Typically caused by low oil levels due to oil consumption, leaks, or lack of maintenance." Steps: allow the generator to cool at least 30 minutes, check and refill oil, check for leaks, clear the alarm.
- Generac Help Center, "Where can I find a list of error codes for my generator" (the family table; an article for a base code "generally applies to all variants of that code").
Which Vehicles Commonly Get GENERAC-1300?
- Generac air-cooled home standby generators (Guardian and Next Generation series)
- Evolution controllers show the code on the display; Power Zone 200 controllers show it in Mobile Link
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