Generac

2691

UnclassifiedCooling

What This Code Means

Low fuel pressure; High fuel level warning; Warning on a configured IO Extender Digital Input; Low coolant detected; High oil temperature; Low oil level; Check Engine warning (emissions certified gas units)

Possible Causes

  • •Fuel pressure falls below 5.2 in H2O +/- 0.4 in (below 0.19 psi)
  • •Fuel level rises above the dealer adjustable setpoint (0-99%) for 1 second
  • •Digital Input status triggered the alarm
  • •Low coolant digital input detected low coolant for greater than 5 seconds
  • •Oil temperature is > 320 °F (160 °C) while the engine is running
  • •Oil level is below limit, detected after a 60 sec hold-off since startup
  • •O2 sensor exists and is faulted (O2 sensor stuck open/closed) for 90 seconds

Suggested Actions

  1. 1Refer to 'Problem 34 – Low Fuel Pressure' page 141
  2. 2Check Fuel Level
  3. 3Review alarm log and address active alarms
  4. 4Refer to 'Problem 26 – Low Coolant Level' page 138
  5. 5Refer to 'Test 115 – Oil Temperature Sensor (OTS) Resistance' page 179
  6. 6Refer to 'Problem 28 – Low/High Oil Pressure' page 138
  7. 7Engine runs with no O2 sensor faults (stuck open/closed) for 4 minutes to clear warning

Related Generac Fault Codes

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