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Cummins/Onan DQFAA Troubleshooting

Cummins/Onan DQFAA troubleshooting: 682 fault codes and 33 symptom-cause-remedy entries from the manufacturer's own service documentation.

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Troubleshooting

715

Fault codes

CodeMeaningCauseRemedy
59High AC voltage shutdownOutput voltage on any phase exceeds preset values. Time to trip is inverse.
111Internal ECM Failure
115Eng Crank Sensor Error
121Engine Magnetic Crankshaft Speed or Position Lost One of Two Signals
122Manifold 1 Press High
123Manifold 1 Press Low
124Manifold 1 Press High
135High Oil Rifle 1 Pressure
137Oil Inlet Pressure Low Error
141Low Oil Rifle 1 Pressure
142Oil Overpressure
143Low Oil Rifle Pressure
144High Coolant 1 Temp
145Low Coolant 1 Temp
146Pre-High Engine Coolant Temperature
151High Coolant Temp
153High Intake Manf 1 Temp
154Low Intake Manf 1 Temp
155High Intake Manf 1 Temp
156Intake Manifold Temp 2 OOR High
157Intake Manifold Temp 2 OOR Low
158Intake Manifold Temp 2 High
159Intake Manifold Temp 3 OOR High
161Intake Manifold Temp 3 OOR Low
162Intake Manifold Temp 3 High
163Intake Manifold Temp 4 OOR High
164Intake Manifold Temp 4 OOR Low
165Intake Manifold Temp 4 High
175Throttle Control OOR High
176Throttle Control OOR Low
177Throttle Control Out of Adjustment
187Sensor Supply 2 Low
189HT Coolant Temperature Cause Unknown
195High Coolant 1 Level
196Low Coolant 1 Level
197Low Coolant Level
212High Oil 1 Temperature
213Low Oil 1 Temperature
214High Oil 1 Temp
219Eng Oil Level Remote Reservoir: Least Severe Level
221Air Pressure Sensor High
222Air Pressure Sensor Low
223Oil Burn Valve Sol Low
224Oil Burn Valve Sol High
227Sensor Supply 2 Low
228Low Coolant Pressure
229HT Coolant Pressure Incorrect
231High Coolant Pressure
232Low Coolant Pressure
233HT Coolant Pressure Moderate Low
234Crankshaft Speed High
235Low Coolant Level
236Both Engine Speed Signals Lost
238Sensor Supply 3 Low
239Main Supply High
244Red Stop Lamp Driver OOR Low
245Fan Control Low
246Exhaust Gas Temp Sensor 1 OOR High
247Exhaust Gas Temp Sensor 1 OOR Low
248Exhaust Gas Temp Sensor 1 High
253Oil Level Low
254FSO PWM High Control Error
255FSO PWM Low Control Error
259Engine Fuel Shutoff Valve Stuck Open
261High Fuel Temperature
263High Fuel 1 Temperature
265Low Fuel 1 Temperature
266High Fuel Temperature
271Low Fuel Pump Press
272High Fuel Pump Press
277Fuel Control Valve Out of Adjustment
281Cylinder Press Imbalance
284Eng Speed/Position Sensor: Voltage Below Normal
285CAN Mux PGN Rate Error
286CAN Mux Calibration Error
287CAN Mux Accel Data Error
295Key On Air Pressure Error
311ACT1 FF Shorted HS TO LS Error
312ACT5 Shorted HS TO LS Error
313ACT3 RF Shorted HS TO LS Error
314ACT6 Shorted HS TO LS Error
315ACT2 FT Shorted HS TO LS_Error
319RTC PWR Intr: Data Erratic Intermittent or Wrong
321ACT4 RT Shorted HS TO LS Error
322Inj 1 Solenoid Low Curr
323Inj 5 Solenoid Low Curr
324Inj 3 Solenoid Low Curr
325Inj 6 Solenoid Low Curr
331Inj 2 Solenoid Low Curr
332Inj 4 Solenoid Low Curr
334HT Coolant Temperature Incorrect
341Engine Control Module Data Lost
342Calibration Code Fail
343ECM Hardware Failure
346Powerdown Data Lost
351Injector Supply Failure
352Sensor Supply 1 Low
354Manifold Absolute Pressure 1 High
355Manifold Absolute Pressure 1 Low
359Fail to Start
378Elect Fuel Inj Cntrl Valve Ckt: Curr Below Normal
379Elect Fuel Inj Cntrl Valve Ckt: Curr Above Normal
386Sensor Supply 1 High
394Eng Timing Actuator Driver: Curr Below Normal
395Eng Timing Actuator Driver: Curr Above Normal
396Fuel Cntl Valve Solenoid Driver 2 Sensor Ckt: OC
397Fuel Cntl Valve Solenoid Driver 2 -
398Eng Timing Actuator Driver 2 Circuit: OC
399Eng Timing Actuator Driver 2: Grounded Ckt
891Spark Plug 1 (A1) Root Cause Unknown
982Spark Plug 2 (B1) Root Cause Unknown
893Spark Plug 3 (A2) Root Cause Unknown
894Spark Plug 4 (B2) Root Cause Unknown
895Spark Plug 5 (A3) Root Cause Unknown
896Spark Plug 6 (B3) Root Cause Unknown
897Spark Plug 7 (A4) Root Cause Unknown
898Spark Plug 8 (B4) Root Cause Unknown
899Spark Plug 9 (A5) Root Cause Unknown
911Spark Plug 10 (B5) Root Cause Unknown
912Spark Plug 11 (A6) Root Cause Unknown
913Spark Plug 12 (B6) Root Cause Unknown
914Spark Plug 13 (A7) Root Cause Unknown
915Spark Plug 14 (B7) Root Cause Unknown
916Spark Plug 15 (A8) Root Cause Unknown
917Spark Plug 16 (B8) Root Cause Unknown
918Spark Plug 17 (A9) Root Cause Unknown
919Spark Plug 18 (B9) Root Cause Unknown
1117Power Lost With Ignition On
1121Fail To Disconnect
1122Rated To Idle Delay
1124Delayed Shutdown
1128Mixer Inlet Humidity Sensor: Volt Above Normal
1129Mixer Inlet Humidity Sensor: Volt Below Normal
1131Battle Short Active
1132Controlled Shutdown
1139UFD Injector 1 Error
1141UFD Injector 2 Error
1142UFD Injector 3 Error
1143UFD Injector 4 Error
1144UFD Injector 5 Error
1145UFD Injector 6 Error
1213Compressor Overboost Error
1219Utility Breaker Tripped
1223Utility Frequency
1224Genset Overvoltage
1225Genset Undervoltage
1226Genset Frequency
1243Engine Derated
1244Engine Normal Shutdown
1245Engine Shutdown Fault
1246Unknown Engine Fault
1247Unannounced Engine Shutdown
1248Engine Warning
1256Ctrl Mod ID In State Error
1257Ctrl Mod ID In State Fail
1274Heavy Knock Error 10 (B5)
1275Knock Cylinder 10 (B5) OOR Low
1276Knock Cylinder 10 (B5) OOR High
1277Knock Cylinder 11 (A6) OOR Low
1278Knock Cylinder 11 (A6) OOR High
1279Knock 12 (B6) High
1281Heavy Knock Error 12 (B6)
1282Knock Cylinder 12 (B6) OOR Low
1283Knock Cylinder 12 (B6) OOR High
1284Knock 13 (B7) High
1285Continuous Light Knock Error 13 (A7)
1286Heavy Knock Error 13 (A7)
1287Knock Cylinder 13 (A7) OOR Low
1288Knock Cylinder 13 (A7) OOR High
1289Knock 14 (B7) High Warning
1291Heavy Knock Error 14 (B7)
1292Knock Cylinder 14 (B7) OOR Low
1293Knock Cylinder 14 (B7) OOR High
1294Knock 15 (A8) High Warning
1295Continuous Light Knock Error 15 (A8)
1296Heavy Knock Error 15 (A8)
1297Knock Cylinder 15 (A8) OOR Low
1298Knock Cylinder 15 (A8) OOR High
1299Knock 16 (B8) High Warning
1311Heavy Knock Error 16 (B8)
1312Configurable Input # 2
1317Configurable Input # 13
1318Configurable Input # 14
1322KW Load Setpoint OOR High
1323KW Load Setpoint OOR Low
1324KVAR Load Setpoint OOR High
1325KVAR Load Setpoint OOR Low
1328Genset Breaker Tripped
1336Cooldown Complete
1338Knock Cylinder 18 (B9) OOR Low
1339Knock Cylinder 18 (B9) OOR High
1352Knock 20 (B10) High Warning
1353Continuous Light Knock Error 20 (B10)
1354Heavy Knock Error 20 (B10)
1355Knock Cylinder 20 (B10) OOR Low
1356Knock Cylinder 20 (B10) OOR High
1357Oil Remote Level Low
1362Oil Filter Restriction Error
1363Intake Manf 1 Press Low
1367High Prefilter Oil Press
1368Low Prefilter Oil Press
1369AUX Temperature 1 Sensor OOR High
1373Start Enable Device 1: Cause Unknown
1376Camshaft Speed Error
1377Post Oil Filter Pressure OOR High
1378Post Oil Filter Pressure OOR Low
1383Intake Manifold 1 Pressure OOR High
1384Intake Manifold 1 Pressure OOR Low
1385Intake Manifold 2 Pressure OOR High
1386Intake Manifold 2 Pressure OOR Low
1411High Out Freq Adjust Pot
1412High Droop Adjust Pot
1416Fail To ShutdownRecords (in the Fault History log) a bypassed shutdown fault while the generator set was in Battle Short mode (this is used to bypass several critical fault shutdowns therefore allowing generator set operation during emergencies); Event/fault 1416 has been activated as a result of another active shutdown fault while the PowerCommand® 3.3 control is operating in Battle Short modeIf possible, troubleshoot this shutdown fault that is causing the generator set to shut down
1417Power Down Failure
1418High Gain Adjust Pot
1427Overspeed Relay Error
1428LOP Relay Error
1429HET Relay Error
1431Pre-LOP Relay Error
1432Pre-HET Relay Error
1433Local Emergency StopA local or remote Emergency Stop has been activatedAfter locating and correcting problem, reset the local/remote Emergency Stop button as follows: De-activate (disable) the Emergency Stop button; Press the Stop button; Press the Reset button; Select the desired operating mode (manual or auto); Check the Emergency Stop button is working correctly
1434Remote Emergency StopA local or remote Emergency Stop has been activatedAfter locating and correcting problem, reset the local/remote Emergency Stop button as follows: De-activate (disable) the Emergency Stop button; Press the Stop button; Press the Reset button; Select the desired operating mode (manual or auto); Check the Emergency Stop button is working correctly
1435Low Coolant TemperatureThe engine coolant heater is not operating or is not circulating coolant; The coolant heater is not connected to a power supply; Possible coolant leaks; Low coolant level; Generator set is not operating (this warning occurs when the engine coolant temperature is 21°C (70°F) or lower)Check for a blown fuse or disconnected heater cable and correct as required; Look for possible coolant leaks and repair as required; Check for low coolant level and replenish if required
1438Fail To CrankA possible fault with the control, speed sensing, or starting system; Emergency Stop button engagedSee code 441 for corrective action; Ensure the Emergency Stop button is disengaged
1439Low Day Tank Fuel SwitchThe day tank fuel supply is running low; Possible fuel leaks; Low fuel levelLook for possible fuel leaks and repair as required; Check for low fuel level and replenish if required
1441Low Fuel LevelThe fuel level has gone below the threshold setting for the low fuel level against the time setting; Possible fuel leaks; Low fuel levelLook for possible fuel leaks and repair as required; Check for low fuel level and replenish if required
1442Weak BatteryDuring cranking, the battery voltage is at, or below the weak battery warning trip point for a time greater than, or equal to the weak battery set timeSee code 441
1443Dead BatteryDuring cranking, the battery voltage has dropped below the operating voltage of the PowerCommand® 3.3 control, which resets the PowerCommand® 3.3 control; After three consecutive resets, event/fault code 1443 becomes activeSee code 441
1444Overload
1445Short Circuit
1446High AC Voltage
1447Low AC Voltage
1448Under FrequencyThe generator set frequency has dropped below 90 % of nominal for approximately ten secondsCheck the fuel supply; Check the air intake supply; Check the load and correct any overload
1449Over Frequency
1451Gen/Bus Voltages Out of Calibration
1452Genset Breaker Fail To Close
1453Genset Breaker Fail To Open
1454Genset Breaker Position Contact
1455Utility Breaker Position Contact
1456Bus Out Of Synchronizer Range
1457Fail To Synchronize
1458Sync Phase Rotation Mismatch Overfrequency
1459Reverse Power
1461Loss of Field (Reverse kVAR)
1463Not In Auto
1464Load Dump Fault
1465Ready To Load
1469Speed/Hz Mismatch
1471Over Current
1472Over Current
1474ECM Software Mismatch
1475First Start Backup
1483Common Alarm
1517Failed Module Shutdown
1518Failed Module Warning
1519At Least One Module Has: Least Severe Fault
1521Exhaust Gas Temperature 3 (A2) OOR High
1522Exhaust Gas Temperature 5 (A3) OOR High
1523Exhaust Gas Temperature 7 (A4) OOR High
1524Exhaust Gas Temperature 9 (A5) OOR High
1525Exhaust Gas Temperature 11 (A6) OOR High
1526Exhaust Gas Temperature 13 (A7) OOR High
1527Exhaust Gas Temperature 15 (A8) OOR High
1528Exhaust Gas Temperature 17 (A9) OOR High
1529Exhaust Gas Temperature 2 (B1) OOR High
1531Exhaust Gas Temperature 6 (B3) OOR High
1532Exhaust Gas Temperature 8 (B4) OOR High
1533Exhaust Gas Temperature 10 (B5) OOR High
1534Exhaust Gas Temperature 12 (B6) OOR High
1535Exhaust Gas Temperature 14 (B7) OOR High
1536Exhaust Gas Temperature 16 (B8) OOR High
1537Exhaust Gas Temperature 18 (B9) OOR High
1540Common Warning
1541Common Shutdown
1545EPS Backup Channel Lost
1546EPS Main Channel Lost
1548Inj 7 Solenoid Low Curr
1549Inj 8 Solenoid Low Curr
1551Inj 7 Solenoid Low Curr
1552Inj 7 Solenoid Low Curr
1553Inj 7 Solenoid Low Curr
1554Inj 7 Solenoid Low Curr
1555Inj 7 Solenoid Low Curr
1556Inj 7 Solenoid Low Curr
1557Inj 7 Solenoid Low Curr
1572Continuous Light Knock Error 19 (A10)
1573Configurable Input #1
1574Heavy Knock Error 19 (A10)
1575Knock Cylinder 19 (A10) OOR Low
1576Knock Cylinder 19 (A10) OOR High
1579Continuous Light Knock Error 12 (B6)
1581Continuous Light Knock Error 14 (B7)
1582Continuous Light Knock Error 16 (B8)
1583Heavy Knock Error 16 (B8)
1584Knock Cylinder 16 (B8) OOR Low
1585Knock Cylinder 16 (B8) OOR High
1586Knock 17 (A9) High Warning
1587Continuous Light Knock Error 17 (A9)
1588Heavy Knock Error 17 (A9)
1589Knock Cylinder 17 (A9) OOR Low
1591Knock Cylinder 17 (A9) OOR High
1592Knock 18 (B9) High Warning
1593Continuous Light Knock Error 18 (B9)
1594Knock 19 (A10) High Warning
1596Aux Temperature 1 Sensor OOR Low
1597ECM Device/Component
1618Exhaust Gas Temperature, Cylinder 1 (A1) OOR High
1619Exhaust Gas Temperature, Cylinder 4 (B2) OOR High
1622Inj 9 Solenoid Low Curr
1636Intake Manifold Pressure 2 OOR High
1637Intake Manifold Pressure 2 OOR Low
1664Exhaust After Oxidation Catalyst Missing
1665Aftertreatment Exhaust Gas Temp1: Voltage Below Normal
1666Aftertreatment Exhaust Gas Temp1: Voltage Above Normal
1674Aftertreatment Exhaust Gas Temp2: Voltage Below Normal
1675Aftertreatment Exhaust Gas Temp2: Voltage Above Normal
1689Real Time Clock Power
1691After Oxidation Catalyst Efficiency: Below Normal
1695Sensor Supply 5 High
1696Sensor Supply 5 Low
1737CAN Throttle Internal Failure Error
1738CAN Throttle Internal Fault Error
1739Engine Throttle Control Condition Exists
1741CAN Throttle High Temp Warning Error
1742CAN Throttle Temperature Limiting Error
1743Throttle Control 2 OOR High
1744Throttle Control 2 OOR Low
1745Throttle Control 2 Incorrect
1746Throttle Control 2 Out of Adjustment
1747Throttle Control 2 Bad Device
1748Throttle Control 2 Root Unknown
1749Throttle Control 2 Condition Exists
1751Throttle Control 2 Warning High
1752Throttle Control 2 Moderate High
1753Fuel Shutoff 2 OOR High
1754Fuel Temperature 2 OOR High
1755Fuel Temperature 2 OOR Low
1756Gas Flow 2 OOR High
1757Gas Flow 2 OOR Low
1758Gas Flow 2 Incorrect Data
1759FCV 2 Positive Feedback Incorrect
1761FCV Actuator Error
1765Engine Gas Control Valve Inlet Pressure 2 OOR High
1766Engine Gas Control Valve Inlet Pressure 2 OOR Low
1767Engine Gas Control Valve Outlet Pressure 2 OOR High
1768Engine Gas Control Valve Outlet Pressure 2 OOR Low
1769Engine Emergency Shutdown Indication OOR High
1771Engine Emergency Shutdown Indication OOR Low
1772Engine Derate Request OOR High
1773Engine Derate Request OOR Low
1774Oil Priming Pump OOR High
1775Oil Priming Pump OOR Low
1778Engine Heater Control Driver High Error
1779Engine Heater Control Driver Low Error
1781Shutdown Request OOR High
1782Shutdown Request OOR Low
1783Coolant Pump Control Driver High Error
1784Coolant Pump Control Driver Low Error
1785Oil Priming Pump Manual Override Input On
1786Oil Priming Pump Stuck On Error
1787Post Lube Oil Priming Error
1788Maintenance Lube Oil Priming Error
1789Pre-start Lube Oil Priming Error
1791Failure To Meet Load Speed Error
1792Idle when Circuit Breaker Closed
1794Fire Detected
1795Compressor Bypass Position High Error
1796Compressor Bypass Position Low Error
1797Compressor Bypass Control OOR High
1798Compressor Bypass Control OOR Low
1985Int Man 3 Temperature Moderate High
1986Int Man 4 Temperature Moderate High
1992Crankcase Sensor High
1993Aftertreatment Particulate Filter Missing
1999Maximum Parallel Time
2111Coolant Inlet Temperature (LT) High Error
2112Coolant Inlet Temperature (LT) Low Error
2113CIT (LT) High Warning Error
2114CIT (LT) High Serious Error
2115LT Coolant Pressure High Error
2116LT Coolant Pressure Low Error
2117LCP (LT) Low Warning Error
2121Exhaust Temperature 1 (A1) High Warning Error
2122Exhaust Temperature 3 (A2) High Warning Error
2123Exhaust Temperature 5 (A3) High Warning Error
2124Exhaust Temperature 7 (A4) High Warning Error
2125Exhaust Temperature 9 (A5) High Warning Error
2126Exhaust Temperature 11 (A6) High Warning Error
2127Exhaust Temperature 13 (A7) High Warning Error
2128Exhaust Temperature 15 (A8) High Warning Error
2129Exhaust Temperature 17 (A9) High Warning Error
2131Exhaust Temperature 2 (B1) High Warning Error
2132Exhaust Temperature 4 (B2) High Warning Error
2133Exhaust Temperature 6 (B3) High Warning Error
2134Exhaust Temperature 8 (B4) High Warning Error
2135Exhaust Temperature 10 (B5) High Warning Error
2136Exhaust Temperature 12 (B6) High Warning Error
2137Exhaust Temperature 14 (B7) High Warning Error
2138Exhaust Temperature 16 (B8) High Warning Error
2139Exhaust Temperature 18 (B9) High Warning Error
2141Start Air Pressure High Error
2142Start Air Pressure Low Error
2143SAP Overpressure Error
2144Exhaust Temperature 16 (B8) High Serious Error
2145Exhaust Temperature 18 (B9) High Serious Error
2146EGT 17 (A9) OOR Low
2147EGT 18 (B9) OOR Low
2154Oil Filter Outlet Pressure High Error
2155Oil Filter Outlet Pressure Low Error
2157Int Man 2 Temp Abnormal Rate
2158Int Man 3 Tmp Abnormal Rate
2159Int Man 4 Tmp Abnormal Rate
2184Fuel Injection Control Valve Root Cause Unknown
2185Sensor Supply 4 High
2186Sensor Supply 4 Low
2188Exhaust O2 OOR High
2191ST Throttle Pressure Error Status
2192Exhaust O2 OOR Low
2193HT Coolant Level Moderate High
2198VGT Actuator Driver Circuit Unknown Cause
2215Fuel Pump Press Low
2217RAM Image Word Error
2219Exhaust O2 Moderate High
2221Exhaust O2 Moderate Low
2231Knock Cylinder 1 (A1) OOR High
2232Knock Cylinder 2 (B1) OOR High
2233Knock Cylinder 3 (A2) OOR High
2234Knock Cylinder 4 (B2) OOR High
2235Knock Cylinder 5 (A3) OOR High
2236Knock Cylinder 6 (B3) OOR High
2237Knock Cylinder 7 (A4) OOR High
2238Knock Cylinder 8 (B4) OOR High
2239Knock Cylinder 9 (A5) OOR High
2249APC 2 Pressure Low
2261Fuel Pump Press High
2262Fuel Pump Press Low
2265High Fuel Lift Pump Volt
2266Low Fuel Lift Pump Volt
2272EGR DL POS Sensor Error
2273EGR Delta P OOR High Error
2274EGR Delta P OOR Low Error
2279Knock 11 (A6) High Warning
2281Knock 11 (A6) Moderate Warning
2282Knock 11 (A6) Critical Warning
2288Turbo Charger 1 Speed Above Normal
2292APC Flow high
2293APC Flow Low
2298Fuel Shutoff 2 OOR Low
2311EFI Control Valve Fail
2498Exhaust Temperature 10 (B5) Abnormal Rate
2499Exhaust Temperature 12 (B6) Abnormal Rate
2511Exhaust Temperature 14 (B7) Abnormal Rate
2512Exhaust Temperature 16 (B8) Abnormal Rate
2513Exhaust Temperature 18 (B9) Abnormal Rate
2514Exhaust Temperature 19 (A10) Abnormal Rate
2515Exhaust Temperature 20 (B10) Abnormal Rate
2517Compressor Outlet Pressure High Error
2518Compressor Outlet Pressure Low Error
2521Bank ID Error
2522Continuous Light Knock Error 1 (A1)
2523Continuous Light Knock Error 2 (B1)
2524Continuous Light Knock Error 3 (A2)
2525Continuous Light Knock Error 4 (B2)
2526Continuous Light Knock Error 5 (A3)
2527Continuous Light Knock Error 6 (B3)
2528Continuous Light Knock Error 7 (A3)
2529Continuous Light Knock Error 8 (B4)
2531Continuous Light Knock Error 9 (A5)
2532Continuous Light Knock Error 10 (B5)
2539High Voltage Bias
2541Low Voltage Bias
2454ECM Overtemperature Error
2545Keysw Reset Required
2553Engine Oil Level Low Warning Error
2554Exhaust Gar Pressure Incorrect
2555Low GHC 1 Voltage
2556High GHC 1 Voltage
2567DG Air Compressor Trip Error
2568Gas Supply Pressure Critical High
2569Gas Supply Pressure Critical Low
2586Spark Plug 1 (A1) High Warning
2587Spark Plug 2 (B1) High Warning
2588Spark Plug 3 (A2) High Warning
2589Spark Plug 4 (BS) High Warning
2591Spark Plug 5 (A3) High Warning
2592Spark Plug 6 (B3) High Warning
2593Spark Plug 1 (A1) Low Warning
2594Spark Plug 2 (B1) Low Warning
2595Spark Plug 3 (A2) Low Warning
2596Spark Plug 4 (B2) Low Warning
2597Spark Plug 5 (A3) Low Warning
2598Spark Plug 6 (B3) Low Warning
2619Aux101 0 Input 1 Fault
2621Aux101 0 Input 2 Fault
2622Aux101 0 Input 3 Fault
2623Aux101 0 Input 4 Fault
2624Aux101 0 Input 5 Fault
2625Aux101 0 Input 6 Fault
2626Aux101 0 Input 7 Fault
2627Aux101 0 Input 8 Fault
2628Aux102 0 Expansion Input 9 Fault
2629Aux102 0 Expansion Input 10 Fault
2631Aux102 0 Expansion Input 11 Fault
2632Aux102 0 Expansion Input 12 Fault
2634VGT Actuator Controller Bad Device/Component
2635VGT Actuator Driver Condition Exists
2636VGT Actuator Circuit Abnormal Update Rate
2637Aftertreatment Catalyst Face Plugged Reason Unknown
2643Throttle Position 2 Feedback OOR High
2644Throttle Position 2 Feedback OOR Low
2646HT Coolant Temperature Condition Exists
2651Exhaust Gas Temperature Right Manifold OOR High
2652Exhaust Gas Temperature Right Manifold OOR Low
2653Exhaust St 2 Temp High
2654Exhaust Stack Temp Right Bank Above Sh Threshold
2655Exhaust Gas Temperature Left Manifold OOR High
2656Exhaust Gas Temperature Left Manifold OOR Low
2657Exhaust St 1 Temp High
2658Exhaust Stack Temp Left Bank Above Sh Threshold
2661At Least One Unacknowledged Most Severe Fault 0 Condition Exists
2662At Least One acknowledged: Most Severe Fault
2678Charging Alternator Fail
2724Gas Supply Pressure Moderate High
2725Gas Supply Pressure Moderate Low
2727Critical CEN Not Accessible Error
2737Exhaust Gas Temperature Critical High
2916Utility AC Meter Failed
2917Gen Bus Voltage OOR Hi
2918Utility Voltage OOR Hi
2919Utility Current OOR Hi
2921Gen Bus Current OOR Hi
2922High Genset Neutral Curr
2923Gen Bus kW OOR Hi
2924Gen Bus kVAR OOR Hi
2925Gen Bus kVA OOR Hi
2926Utility kW OOR Hi
2927Utility kVAR OOR Hi
2928Utility kVA OOR Hi
2931Aux101 Device ID Fault
2932Aux101 Oil Temperature OOR Hi
2933Aux101 Oil Temperature OOR Low
2934High Ambient Temp
2935Low Ambient Temp
2936Fuel Level High
2937Fuel Level Low
2938Earth/Ground Fault
2939Modbus Failure
2941Remote Shutdown Fault Reset Occurrence
2942Shutdown Override Fail
2943Manual Sw Config Fail
2944Auto Switch Config Fail
2945Rupture Basin Switch
2946Exhaust St 2 Temp Low
2947Exhaust St 1 Temp Low
2948Exhaust St 2 Temp High
2949Exhaust St 1 Temp High
2951Alternator 1 Temp High
2952Alternator 1 Temp Low
2953Alternator 1 Temp High
2954Alternator 2 Temp High
2955Alternator 2 Temp Low
2956Alternator 2 Temp High
2957Alternator 3 Temp High
2958Alternator 3 Temp Low
2959Alternator 3 Temp High
2961EGR Torque Derate Error
2962EGR RPM Derate Error
2963HT Coolant Temperature Warning High
2964Pre-high Intake Manifold Temperature
2965Genset Available
2971Test/Exercise Fault
2972Field Overload
2973Charge Press IR Error
2977Low Coolant Level 2 Sw
2978Low Intake Manf 1 Temp
2979High Alternator Temp Sw
2981High Drive Bearing Temp
2982Low Drive Bearing Temp
2983High Drive Bearing Temp
2984High Free Bearing Temp
2985Low Free Bearing Temp
2986High Free Bearing Temp
2992High Intake Manf 1 Temp
2993Battery Charger Sw Fail
2994MC68302 Error
2995Int Man Pressure 1 Critical High
2996Int Man Pressure 1 Moderate High
2997Exhaust O2 Critical Low
3111Excessive Mech Vibration 1 (A1)
3112Excessive Mech Vibration 2 (B1)
3113Excessive Mech Vibration 3 (A2)
3114Excessive Mech Vibration 4 (B2)
3115Excessive Mech Vibration 5 (A3)
3116Excessive Mech Vibration 6 (B3)
3117Excessive Mech Vibration 7 (A4)
3118Excessive Mech Vibration 8 (B4)
3119Excessive Mech Vibration 9 (A5)
3121Excessive Mech Vibration 10 (B5)
3122Excessive Mech Vibration 11 (A6)
3123Excessive Mech Vibration 12 (B6)
3124Excessive Mech Vibration 13 (A7)
3125Excessive Mech Vibration 14 (B7)
3126Excessive Mech Vibration 15 (A8)
3127Excessive Mech Vibration 16 (B8)
3128Excessive Mech Vibration 17 (A9)
3129Excessive Mech Vibration 18 (B9)
3131Secondary Engine Overspeed
3133Aftertreatment Particulate Filter Outlet Pressure OOR High
3134Aftertreatment Particulate Filter Outlet Pressure OOR Low
3135Aftertreatment Particulate Filter Pressure Data Eratic
3226Base Load
3227Peak Shave
3228Aftertreatment Intake Nox Sensor: Data Incorrect *
3232Aftertreatment Intake Nox Sensor: Abnormal Update *
3245Aftertreatment Particulate Filter System: Not Responding *
3251Aftertreatment Catalyst Intake Temp: Data Valid: Above Normal *
5157Low Battery 3 Voltage
5158Low Battery 4 Voltage
5159Weak Battery 1
5161Weak Battery 2
5162Weak Battery 3
5163Weak Battery 4
5164Battery Charger 2 Failed Fault
5165Battery Charger 3 Failed Fault
5166Battery Charger 4 Failed Fault
5178Crankcase Pressure 2 Data Incorrect
5182AUX101 0 Input 1 Fault
5283High Battery 1 Voltage
5284High Battery 2 Voltage
5285High Battery 3 Voltage
5286High Battery 4 Voltage
5287Starter Air Supply Pressure Low
5288Starter Air Tank Volume Low
5377AUX101-3 Communication Lost Fault
5378AUX101-4 Communication Lost Fault
5397L-N Short Circuit Shutdown
5398L-L Short Circuit Shutdown
5399AmpSentry Maintenance Mode Active
5531Cam Position Frequency Mismatch
9945Injector 6 Circuit 2 Error
9946Injector 5 Circuit 2 Error
9947Injector 4 Circuit 2 Error
9948Injector 3 Circuit 2 Error
9949Injector 2 Circuit 2 Error
9951Injector 1 Circuit 2 Error
9971ECM Derate Fault
9973Watchdog Reset Occurence
143Low Oil Rifle Pressure — WarningEngine oil pressure has dropped below the warning trip pointIf the generator set is powering critical loads and cannot be shut down, wait until the next shutdown period and then follow the fault code 415 procedure
144High Coolant 1 Temp — WarningThe engine has begun to overheat and engine coolant temperature has risen to an unacceptable level; Increase in load or higher ambient temperature may cause a High Coolant Temp (151) shutdownReview fault code 151 correction list for other possible causes
145Low Coolant 1 Temp — WarningEngine coolant temperature is below the low coolant temperature warning thresholdIf the generator set is powering critical loads and cannot be shut down, wait until the next shutdown period and then follow the fault code 1435 procedure
146Pre-High Engine Coolant Temperature — DerateThe engine is operating near cooling system capacity; Increase in load or higher ambient temperature may cause a High Coolant Temp (151) shutdownReview fault code 151 correction list for other possible causes
151High Coolant Temp — ShutdownThe engine has overheated (coolant temperature has risen above the shutdown trip point or coolant level is low)Allow the engine to cool down completely before proceeding with the following checks: Look for possible coolant leakage points and repair if necessary. Check the coolant level and replenish if low; Check for obstructions to cooling airflow and correct as necessary; Check the fan belt and repair or tighten if necessary; Check the blower fan and circulation pumps on remote radiator installations; Reset the control and restart after locating and correcting the problem
155High Intake Manf 1 Temp — ShutdownThe engine has overheated (intake manifold temperature has risen above the shutdown trip point); Large load or high ambient temperature may be the causeReview fault code 151 correction list for other possible causes
196Low Coolant 1 Level — WarningEngine coolant level has fallen below the trip pointIf the generator is powering critical loads and cannot be shut down, wait until the next shutdown period. If the engine can be stopped, allow the engine to cool down completely before proceeding: Look for possible coolant leakage points and repair if necessary; Check coolant level and replenish if low; Reset the control and restart after locating and correcting the problem
197Low Coolant Level — WarningEngine coolant level has fallen below the trip pointIf the generator is powering critical loads and cannot be shut down, wait until the next shutdown period. If the engine can be stopped, allow the engine to cool down completely before proceeding: Look for possible coolant leakage points and repair if necessary; Check coolant level and replenish if low; Reset the control and restart after locating and correcting the problem
235Low Coolant Level — ShutdownLow Coolant Level input is active and the threshold response is set to ShutdownAllow the engine to cool down completely before proceeding: Look for possible coolant leakage points and repair if necessary; Check the coolant level and replenish if low; Reset the control and restart after locating and correcting the problem
359Fail To Start — ShutdownA possible fault with the control or starting system (engine cranks but fails to start); Empty fuel tank, fuel leaks, or blocked fuel lines; Dirty fuel filter; Dirty or blocked air filter; Loose or dirty battery cable connections; Discharged or defective batteryAllow the engine to cool down completely before proceeding with the following checks: Check for an empty fuel tank, fuel leaks, or blocked fuel lines and correct as required; Check for a dirty fuel filter and replace if necessary; Check for a dirty or blocked air filter and replace if necessary; Clean and tighten all battery cable connections; Discharged or defective battery. Recharge or replace; Reset the control and restart after correcting the problem
415Low Oil Rifle press — ShutdownEngine oil pressure has dropped below the shutdown trip pointAllow the engine to cool down completely before proceeding with the following checks: Check the oil level, lines and filters; If the oil system is OK but the oil level is low, replenish; Reset the control and restart after locating and correcting the problem
427CAN Data Link Degraded — WarningCommunication between the engine control (ECM) and the PCC is severedAllow the engine to cool down completely before proceeding: Ensure the E-Stop button is not active. Reset the Local/Remote Emergency Stop
441Low Battery 1 Voltage — WarningBattery voltage is below 24 VDC and is approaching a low level at which unpredictable operation will occur; Loose or dirty battery terminals; Low electrolyte level; Discharged or defective batteryIf the engine can be stopped, allow the engine to cool down completely before proceeding: Clean battery terminals and tighten all connections; Check the electrolyte level, top up and re-charge (if applicable); Discharged or defective battery. Recharge or replace
442High Battery 1 Voltage — WarningThe battery voltage to the control is approaching a high level (exceeding 32 VDC) at which damage to the control can occur; Loose or dirty battery terminals; Battery charge float level too highIf the engine can be stopped, allow the engine to cool down completely before proceeding: Clean the battery terminals and tighten all connections; Check the battery charge float level if applicable (lower float level)
488High Intake Manf 1 temp — DerateThe engine has overheated (intake manifold temperature has risen above the shutdown trip point); Large load or high ambient temperature may be the causeReview fault code 151 correction list for other possible causes
611Engine Hot Shut Down — WarningAn engine hot shutdown has occurred (cooldown timers were bypassed); This condition will occur when the operator presses the Emergency Switch or presses the Stop button before the generator set completes the cooldown operation (generator set should run at 10% or less load for three minutes before engine shutdown)This type of hot shutdown should be avoided; it can cause possible loss of performance and engine damage
781CAN Data Link Failure — ShutdownCommunication between the engine control (ECM) and the PowerCommand® 3.3 control has been severedEnsure the E-Stop button is not active. Reset the Local/Remote Emergency Stop
1131Battle Short Active — WarningThe control is in Battle Short mode (used to bypass several fault shutdowns therefore allowing generator set operation during emergencies)If possible, investigate any fault codes that are being bypassed
1312, 1317, and 1318Configurable Input #2, 13, and 14 — EventThe nature of the fault is an optional customer selection – configurable input #. Example inputs: Low Fuel Day Tank, Water In Fuel, Ground Fault, etc. Each of the fault functions can be programmed using InPower service tool or by accessing the Setup menuIf the engine can be stopped, allow the engine to cool down completely before proceeding: Check the Input # requirements and correct if possible
1416Fail To Shutdown — WarningRecords (in the Fault History log) a bypassed shutdown fault while the generator set was in Battle Short mode (this is used to bypass several critical fault shutdowns therefore allowing generator set operation during emergencies); Event/fault 1416 has been activated as a result of another active shutdown fault while the PowerCommand® 3.3 control is operating in Battle Short modeIf possible, troubleshoot this shutdown fault that is causing the generator set to shut down
1433/1434Local Emergency Stop/Remote Emergency Stop — ShutdownA local or remote Emergency Stop has been activatedEmergency Stop shutdown status can be reset only at the local control panel. Allow the engine to cool down completely before proceeding with the following checks: After locating and correcting problem, reset the local/remote Emergency Stop button as follows: De-activate (disable) the Emergency Stop button; Press the Stop button; Press the Reset button; Select the desired operating mode (manual or auto); Check the Emergency Stop button is working correctly
1435Low Coolant Temperature — WarningThe engine coolant heater is not operating or is not circulating coolant; The coolant heater is not connected to a power supply; Possible coolant leaks; Low coolant level; Generator set is not operating (this warning occurs when the engine coolant temperature is 21°C (70°F) or lower)If the engine can be stopped, allow the engine to cool down completely before proceeding with the following checks: The coolant heater is not connected to a power supply. Check for a blown fuse or disconnected heater cable and correct as required; Look for possible coolant leaks and repair as required; Check for low coolant level and replenish if required
1438Fail To Crank — ShutdownA possible fault with the control, speed sensing, or starting system; Emergency Stop button engagedAllow the engine to cool down completely before proceeding with the following checks: Indicates a possible fault with the control, speed sensing, or starting system. See code 441 for corrective action; Ensure the Emergency Stop button is disengaged
1439Low Day Tank Fuel Switch — WarningThe day tank fuel supply is running low; Possible fuel leaks; Low fuel levelIf the engine can be stopped, allow engine to cool down completely before proceeding with the following checks: Look for possible fuel leaks and repair as required; Check for low fuel level and replenish if required
1441Low Fuel Level — WarningThe fuel level has gone below the threshold setting for the low fuel level against the time setting; Possible fuel leaks; Low fuel levelIf the engine can be stopped, allow the engine to cool down completely before proceeding with the following checks: Look for possible fuel leaks and repair as required; Check for low fuel level and replenish if required
1442Weak Battery — WarningDuring cranking, the battery voltage is at, or below the weak battery warning trip point for a time greater than, or equal to the weak battery set timeIf the engine can be stopped, allow the engine to cool down completely before proceeding with the following checks: See code 441
1443Dead Battery — ShutdownDuring cranking, the battery voltage has dropped below the operating voltage of the PowerCommand® 3.3 control, which resets the PowerCommand® 3.3 control; After three consecutive resets, event/fault code 1443 becomes activeIf the engine can be stopped, allow the engine to cool down completely before proceeding with the following checks: See code 441
1448Under Frequency — ShutdownThe generator set frequency has dropped below 90 % of nominal for approximately ten secondsAllow the engine to cool down completely before proceeding with the following checks: Check the fuel supply; Check the air intake supply; Check the load and correct any overload
1449Over Frequency — ShutdownThe generator set frequency has exceeded the Over Frequency threshold for the set time parameterAllow the engine to cool down completely before proceeding with the following checks: Check the fuel supply; Check the air intake supply; Check the load and correct any overload
1852Pre-High H2O In Fuel — WarningThe water in the fuel is above normal and has reached the warning trip pointIf the engine can be stopped, allow the engine to cool down completely before proceeding with the following checks: Check fuel in tank (local or remote); Drain and re-fill if necessary. Be aware of all Health and Safety, and environmental issues if draining tank
2977Low Coolant 2 Level — WarningThe engine coolant level, in the second radiator, has fallen below the trip pointIf the generator is powering critical loads and cannot be shut down, wait until the next shutdown period. If the engine can be stopped, allow the engine to cool down completely before proceeding: Look for possible coolant leakage points and repair if necessary. Check coolant level and replenish if low; Reset the control and restart after locating and correcting the problem
3416Start System Fault – Condition Exists — WarningRefer to fault codes 359 and 1438
59High AC voltage shutdown - Output voltage on any phase exceeds preset values. Time to trip is inversely proportional to amount above threshold. Values adjustable from 105-125% of nominal voltage, with time delay adjustable from 0.1-10 seconds. Default value is 110% for 10 seconds.
27Low AC voltage shutdown - Voltage on any phase has dropped below a preset value. Adjustable over a range of 50-95% of reference voltage, time delay 2-20 seconds. Default value is 85% for 10 seconds. Function tracks reference voltage. Control does not nuisance trip when voltage varies due to the control directing voltage to drop, such as during a V/Hz roll-off or synchronizing.
81Under frequency shutdown - Genset output frequency cannot be maintained. Settings are adjustable from 2-10 Hz below reference governor set point, for a 5- 20 second time delay.

Symptoms & remedies

SymptomCauseRemedy
Battle short modeIf enabled and the battle short switch is active, some shutdown faults will be bypassed. However, emergency stop shutdowns and other critical faults are not bypassed.
DerateThe derate function reduces output power of the genset in response to a fault condition. Commands will be issued to reduce load via contact closures or ModBus if on an isolated bus, and by lowering base load kW to target kW if in utility parallel mode.
Emergency stopAnnunciated whenever either emergency stop signal is received from an external switch.
Low and high battery voltage warningIndicates status of the battery charging system (failure) by continuously monitoring battery voltage.
Weak battery warningThe control system will test the battery each time the genset is signaled to start and indicate a warning if the battery indicates impending failure.
Fail to start (overcrank) shutdownThe control system will indicate a fault if the genset fails to start by the completion of the engine crack sequence.
Fail to crank shutdownControl has signaled starter to crank engine but engine does not rotate.
Cranking lockoutThe control will not allow the starter to attempt to engage or to crank the engine when the engine is rotating.
Fault simulationThe control in conjunction with InPower software, allows a technician to verify the proper operation of the control and its interface by simulating failure modes or forcing the control to operate outside of its normal operating ranges.
Off load running (protection)Protects the engine in the event the genset is being called to go off load for too long.
Overspeed shutdownDefault setting is 115% of nominal.
Low lube oil pressure warning/shutdownLevel is preset (configurable with InPower or HMI) to match the capabilities of the engine used. Control includes time delays to prevent nuisance alarms.
High lube oil temperature warning/shutdownLevel is preset (configurable with InPower or HMI) to match the capabilities of the engine used. Control includes time delays to prevent nuisance alarms.
High engine temperature warning/shutdownLevel is preset (configurable with InPower or HMI) to match the capabilities of the engine used. Control includes time delays to prevent nuisance alarms.
Low coolant temperature warningIndicates that engine temperature may not be high enough for a 10 second start or proper load acceptance. Can be set up to be a warning or shutdown.
High intake manifold temperature shutdownLevel is preset (configurable with InPower or HMI) to match the capabilities of the engine used. Control includes time delays to prevent nuisance alarms.
Engine fault detectionHandled inside the engine ECM, fault information communicated via SAE-J1939 data link for annunciation in HMI.
Battery completely dischargedPoor battery terminal connectionClean connections, replace and tighten.
Battery completely dischargedCharge alternator/alternator connection faultContact your nearest Cummins distributor.
Battery completely dischargedMains battery charger/charger connections fault/mains supply faultContact your nearest Cummins distributor.
Battery completely dischargedBlown fuseContact your nearest Cummins distributor.
Battery completely dischargedBattery faultContact your nearest Cummins distributor.
Battery completely dischargedNewly installed battery shipped dryFill with electrolyte and give commissioning charge.
Battery low chargePoor battery connectionClean connections, reconnect and tighten securely.
Battery low chargeCharge alternator/alternator connection faultContact your nearest Cummins distributor.
Battery low chargeMains battery charger/charger connections faultContact your nearest Cummins distributor.
Battery low chargeInequality in cell chargeContact your nearest Cummins distributor.
Battery low chargeBattery faultContact your nearest Cummins distributor.
Battery overchargedCharge alternator faultContact your nearest Cummins distributor.
Battery overchargedMains battery charge faultContact your nearest Cummins distributor.
Battery overchargedLow battery fluid levelCheck the charger; it may not be shutting off when the charge is complete.
Battery terminals getting hotPoor battery connectionClean connections, reconnect and tighten securely.; Contact your nearest Cummins distributor.
Line circuit breaker tripsThe load exceeds the circuit breaker current rating; overload or short circuitLocate the source of the overload or short circuit, and correct/eliminate the fault. Manually reset the breaker. Clear any fault messages and when safe to do so, reconnect the load to the generator

Fault codes and symptom→remedy steps extracted from this model’s service/owner documentation; verify against the official manual before servicing.

Common questions

Cummins/Onan DQFAA: Battery completely discharged — what causes it?

Documented causes: Poor battery terminal connection; Charge alternator/alternator connection fault; Mains battery charger/charger connections fault/mains supply fault; Blown fuse. See the table for the matching fixes.

Cummins/Onan DQFAA: Battery low charge — what causes it?

Documented causes: Poor battery connection; Charge alternator/alternator connection fault; Mains battery charger/charger connections fault; Inequality in cell charge. See the table for the matching fixes.

Cummins/Onan DQFAA: Battery overcharged — what causes it?

Documented causes: Charge alternator fault; Mains battery charge fault; Low battery fluid level. See the table for the matching fixes.