When using a Briggs & Stratton generator, understanding fault codes is essential for troubleshooting and maintaining reliable performance. These generators are equipped with advanced control panels that display error or fault codes when something goes wrong.
Each code points to a specific issue, ranging from low oil pressure to voltage irregularities – helping users quickly identify and resolve problems.
Briggs and Stratton Generator Fault Codes
Common Fault Codes
| Fault Code | Fault Description | Possible Cause | Recommended Solution |
|---|---|---|---|
| FC_61 | CAN Bus Communication Failure | Loose or damaged communication wiring | Inspect CAN bus wiring and connectors |
| FC_62 | ECU Internal Fault | Control unit malfunction | Reset or replace ECU |
| FC_63 | Fuel Pump Relay Fault | Faulty relay or wiring issue | Replace relay, check wiring |
| FC_64 | Intake Air Temperature Sensor Fault | Sensor failure or disconnection | Replace or reconnect sensor |
| FC_65 | Coolant Level Low (Liquid-cooled models) | Coolant leak or low level | Refill coolant and inspect leaks |
| FC_66 | Coolant Temperature High | Radiator blockage or fan failure | Clean radiator, check fan |
| FC_67 | Oil Pressure Sensor Fault | Sensor malfunction | Replace oil pressure sensor |
| FC_68 | Charging System Failure | Alternator or regulator issue | Inspect charging components |
| FC_69 | Engine Stall Detected | Fuel interruption or ignition issue | Check fuel and ignition system |
| FC_70 | Fuel Quality Issue | Contaminated or old fuel | Drain and replace with fresh fuel |
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Electrical Fault Codes
| Fault Code | Fault Description | Possible Cause | Recommended Solution |
|---|---|---|---|
| FC_71 | AVR Overload | Automatic Voltage Regulator overloaded | Reduce load, inspect AVR |
| FC_72 | AVR Underperformance | Faulty voltage regulation | Replace AVR |
| FC_73 | Harmonic Distortion High | Poor load quality or electronics interference | Use cleaner power load |
| FC_74 | Neutral Fault | Improper neutral connection | Check neutral wiring |
| FC_75 | Ground Leakage | Insulation breakdown | Inspect cables and insulation |
| FC_76 | Circuit Breaker Trip | Overcurrent or short circuit | Reset breaker, reduce load |
| FC_77 | Surge Protection Activated | Voltage spike detected | Inspect surge protection system |
| FC_78 | Power Factor Error | Inefficient load usage | Balance electrical load |
| FC_79 | Capacitor Fault | Failed capacitor in alternator | Replace capacitor |
| FC_80 | Transformer Fault | Internal transformer damage | Inspect and replace transformer |
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Engine & Mechanical Fault Codes
| Fault Code | Fault Description | Possible Cause | Recommended Solution |
|---|---|---|---|
| FC_81 | Valve Clearance Issue | Improper valve adjustment | Adjust valve clearance |
| FC_82 | Camshaft Sensor Fault | Sensor failure | Replace camshaft sensor |
| FC_83 | Engine Misfire | Faulty spark plug or fuel imbalance | Replace spark plug, inspect injectors |
| FC_84 | Air-Fuel Ratio Imbalance | Carburetor or injector issue | Adjust carburetor or clean injectors |
| FC_85 | Crankcase Pressure High | Blocked breather | Clean crankcase ventilation |
| FC_86 | Piston Ring Wear | Engine wear | Rebuild engine |
| FC_87 | Timing Issue | Incorrect ignition timing | Adjust timing |
| FC_88 | Lubrication Failure | Oil pump malfunction | Inspect oil pump |
| FC_89 | Belt Failure | Broken or loose belt | Replace or tighten belt |
| FC_90 | Flywheel Fault | Damaged flywheel | Replace flywheel |
Related Briggs and Stratton Head Gasket Chart(For All Models)
Safety & Monitoring Fault Codes
| Fault Code | Fault Description | Possible Cause | Recommended Solution |
|---|---|---|---|
| FC_91 | Overcurrent Protection Activated | Load exceeds safe current | Reduce load |
| FC_92 | Thermal Shutdown | Excessive internal temperature | Allow cooling, improve airflow |
| FC_93 | Low Ambient Temperature Warning | Cold environment affecting performance | Use cold-weather kit |
| FC_94 | High Ambient Temperature Warning | Excess heat in environment | Improve ventilation |
| FC_95 | Intrusion Detection | Unauthorized enclosure access | Secure generator enclosure |
| FC_96 | Smoke Detection | Possible fire hazard | Shut down and inspect immediately |
| FC_97 | Fuel Vapor Detection | Fuel evaporation leak | Inspect fuel system |
| FC_98 | Overload Shutdown Delay Fault | Delay circuit failure | Inspect control module |
| FC_99 | Emergency Shutdown Circuit Fault | Circuit malfunction | Repair shutdown circuit |
| FC_100 | Safety Interlock Failure | Safety system malfunction | Inspect interlock switches |
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Control & Smart System Fault Codes
| Fault Code | Fault Description | Possible Cause | Recommended Solution |
|---|---|---|---|
| FC_101 | Firmware Update Required | Outdated system firmware | Update firmware |
| FC_102 | Cloud Sync Failure | Network issue | Check internet connection |
| FC_103 | Mobile App Connection Error | App pairing issue | Reconnect mobile app |
| FC_104 | Remote Monitoring Offline | Signal loss | Restore connectivity |
| FC_105 | Data Transmission Error | Communication interruption | Inspect data modules |
| FC_106 | Memory Storage Full | Data log overflow | Clear logs |
| FC_107 | Sensor Data Conflict | Conflicting readings | Recalibrate sensors |
| FC_108 | Time Sync Error | Clock mismatch | Reset system clock |
| FC_109 | GPS Signal Lost | Weak GPS signal | Reposition generator |
| FC_110 | Authentication Failure | Login/security issue | Reset credentials |
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Fault Codes Set
| Fault Code | Fault Description | Possible Cause | Recommended Solution |
|---|---|---|---|
| FC_111 | Load Shedding Failure | Load management issue | Inspect load controller |
| FC_112 | Peak Demand Exceeded | Too many devices connected | Reduce peak load |
| FC_113 | Generator Synchronization Fault | Sync failure in parallel systems | Check synchronization settings |
| FC_114 | Parallel Operation Error | Communication failure between units | Inspect parallel cables |
| FC_115 | Phase Imbalance Shutdown | Unequal phase loads | Balance loads |
| FC_116 | Black Start Failure | Generator fails to start independently | Check battery and starter |
| FC_117 | Auto Restart Failure | Restart sequence failed | Inspect control logic |
| FC_118 | Manual Override Fault | Override system issue | Reset manual controls |
| FC_119 | Test Mode Failure | Diagnostic mode malfunction | Reset system |
| FC_120 | System Lockout | Multiple faults triggered lockout | Clear faults and reset system |
Final Thoughts
Understanding Briggs & Stratton generator fault codes can save you time, money, and frustration. Instead of guessing what’s wrong, these codes give you a clear direction for troubleshooting. Always start with basic checks, such as oil level, fuel quality, and battery condition, before moving on to more complex repairs.
If a fault persists after basic troubleshooting, it’s best to consult a qualified technician or refer to your generator’s official manual. Regular maintenance, including oil changes, air filter cleaning, and system inspections, will also help prevent many of these faults from occurring in the first place.
