KEM 5.7L Engine

• A non-emissions related issue occurs. Check Gauges Light
  Fix: The lighting of this fault indicator would indicate to the operator that the gauges for oil pressure and coolant temperature should be checked immediately and action taken to eliminate engine damage. If the engine should shut down for no apparent reason, check this lamp. Similar to the MIL, the fault code will have to be read and cleared before continuing vehicle operation (after repairing the root problem).
• A fault exists that is related to the emissions control system. Check Engine Light
  Cause: Sensor output and/or conditions that adversely affect the emissions output of the engine. Some components can cause problems are: crank sensor, cam sensor, fuel injectors, regulators, O2 sensors (pre or post), ignition system and MAP sensor.
  Fix: Stop operation of engine as soon as safely possible. Request that a technician inspect the fault code setting, he or she will connect a scan tool to determine the cause of the check engine light illuminating, repair the problem and clear the codes.

Compiled from service & troubleshooting documentation across every generator set that uses the KEM 5.7L.

Pooled from every document that names this exact engine — confirm the interval and part number against your unit's serial number.