Onan Modified Ford V-6 ESG-642 Engine Engine

• WEAK BATTERY (WARNING) CODE 1442
• UNDER FREQUENCY (SHUTDOWN) CODE 1448
• Status Indicators are not functioning properly.
  Fix: Check the status indicators for any visible damage or loose connections. If the issue persists, refer to the troubleshooting table for further assistance.
• SHORT CIRCUIT (SHUTDOWN) CODE 1445
• OVER FREQUENCY (warning) CODE 1449
• OVER CURRENT (WARNING/SHUTDOWN) CODE 1471/1472
• LOW COOLANT LEVEL (WARNING/SHUTDOWN) CODE 197/235
• LOW BATTERY VOLTAGE (WARNING) CODE 441
• LOW AC VOLTAGE (SHUTDOWN) CODE 1447
• Line Circuit Breaker (Optional) trips frequently.
  Fix: Check the circuit breaker for any visible damage or loose connections. Verify that the load connected to the generator is within the rated capacity of the unit. If the issue persists, refer to the troubleshooting table for further assistance.
• KW OVERLOAD (WARNING) CODE 1444
• HIGH BATTERY VOLTAGE (WARNING) CODE 442
• HIGH AC VOLTAGE (SHUTDOWN) CODE 1446
• Generator produces low output power. F02
  Fix: Check the air filter for blockage or damage. Verify that the fuel supply is adequate and check for any fuel system issues. Refer to the Fault Code Table for further troubleshooting.
• Generator produces excessive vibration. F04
  Fix: Check the engine mounts for any damage or wear. Verify that all components are properly tightened, including bolts and nuts. Refer to the Fault Code Table for further troubleshooting.

Compiled from service & troubleshooting documentation across every generator set that uses the Onan Modified Ford V-6 ESG-642.

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