23 Marine Power generator fault/alarm codes with symptom, cause and remedy — compiled from Marine Power service and controller documentation.
| Code | Meaning / symptom | Cause | Remedy |
|---|---|---|---|
| 12 | Diagnostic Trouble Code (DTC) system operating | ||
| DTC 13 | Oxygen (02) Sensor 1 Circuit Inactive | ||
| DTC 14 | Engine Coolant Temperature (ECT) Sensor Circuit. Low Temperature Indicated. | ||
| DTC 15 | Engine Coolant Temperature (ECT) Sensor Circuit. High Temperature Indicated. | ||
| DTC 21 | Throttle Position (TP) Sensor Circuit. High Signal Voltage Indicated. | ||
| DTC 22 | Throttle Position (TP) Sensor Circuit. Low Signal Voltage Indicated. | ||
| DTC 23 | Intake Air Temperature (IAT) Sensor Circuit. Low Temperature Indicated. | ||
| DTC 24 | Vehicle Speed Sensor (VSS) Circuit Inactive. | ||
| DTC 25 | Intake Air Temperature (IAT) Sensor Circuit. High Temperature Indicated. | ||
| DTC 31 | Governor System Inactive | ||
| DTC 32 | Exhaust Gas Recirculation (EGR) Valve Circuit Inactive. | ||
| DTC 33 | Manifold Absolute Pressure (MAP) Sensor Circuit. High Signal Voltage Indicated. | ||
| DTC 34 | Manifold Absolute Pressure (MAP) Sensor Circuit. Low Signal Voltage Indicated. | ||
| DTC 41 | Ignition Control (IC) H Fault. | ||
| DTC 41 | Enhanced Ignition System | Test for open in IC timing control circuit, check connections, replace components as necessary. | |
| DTC 44 | Knock Sensor (KS) 1 Circuit Inactive. | ||
| DTC 51 | Calibration Checksum Failure. | ||
| DTC 54 | Oxygen (02) Sensor 1 Low Voltage. Lean Exhaust Indicated. | ||
| DTC 55 | Oxygen (02) Sensor 1 Low Voltage. Rich Exhaust Indicated. | ||
| DTC 61 | High Fuel Pressure Indicated. | ||
| DTC 62 | Low Fuel Pressure Indicated. | ||
| DTC 63 | High Fuel Temperature Indicated. | ||
| DTC 64 | Low Fuel Temperature Indicated. | ||
| DTC 81 | Crankshaft Position (CKP) Sensor Circuit Fault. |
Compiled from Marine Power service manuals and controller documentation. 1 code numbers mean different things on different controllers; each meaning is listed with the models it applies to. Cause/remedy shown where extracted; always verify against the manual for your exact model.