Generator displays E23; controller indicates sensor supply or analog input fault.

Safety first: Turn the generator OFF and disconnect the battery before testing sensor circuits.

• Check controller diagnostics: Identify which sensor channel is reporting out‑of‑range values.
• Inspect sensor wiring: Follow the harness from the controller to the suspect sensor. Look for crushed sections, melted insulation, or contact with hot surfaces.
• Unplug suspect sensor: Disconnect the sensor and see if E23 changes or clears when power is restored. If it does, the sensor may be shorted and should be replaced.
• Measure sensor supply voltage: With the harness disconnected, measure the sensor supply voltage at the controller pins. If absent, the controller's internal regulator may be damaged and the module will need replacement.