Nexus
Overcrank
Overcrank
Engine · Alarm
The Nexus controller shows the word Overcrank, not a four-digit Evolution e-code. The manual says the set cranks and rests, then stops and latches Overcrank when it cannot start. The cycle it prints is 16 seconds crank, 7 seconds rest, 16 seconds crank, 7 seconds rest, then three more cycles of 7 seconds crank and 7 seconds rest. Clear it by setting AUTO/OFF/MANUAL to OFF, then back to AUTO. If the cause remains, the fault returns.
Seen on: Air-cooled generators with the Nexus controller covered by the Nexus diagnostic manual.
Likely causes
- A no-fuel or other no-start condition while the engine is still able to crank.
- The manual's overcrank section is specifically about repeated start attempts, not low oil.
Checks an owner can do
- Confirm fuel is on and the LP tank is not empty, then let the starter rest.
- Reset only after that check: OFF, then AUTO.
When to call a pro
Repeated overcrank with fuel available needs the manual's no-start tests. Do not hold a remote start closed to force extra cranking.
Source
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/nexus-overcrank