| AUXILIARY SHUTDOWN | Auxiliary Shutdown | Unit will not start | Shutdown | Set auxiliary shutdown switch(es) to CLOSED (I); clear alarm |
| BATTERY PROBLEM | Battery Problem | Yellow LED illuminated | Warning | Contact servicing dealer |
| Battery Problem | Battery Fault | Battery condition poor or battery charger issue | Warning | Inspect battery condition and connections. Contact IASD if needed. |
| CHARGER MISSING AC | Charger Missing AC | Yellow LED illuminated in any state | Warning | Contact an IASD |
| CHARGER WARNING | Charger Warning | Yellow LED illuminated | Warning | Contact servicing dealer |
| Controller Fault | Control Module Failure | Internal controller fault detected | Shutdown | Contact IASD for assistance |
| CONTROLLER FAULT | Controller Fault | Alarm message listed on controller menu. | Shutdown | Contact an IASD. |
| DTC 11 | Intake cam / distributor position error | SPN 520800:FMI 7. Cam position error; difference between desired and actual CAM position greater than 30 CAD with engine RPM greater than 500. | Warning | Check CAM position sensor; CAM position is not adjustable; sensor located on front of timing cover |
| DTC 16 | Crank and/or cam could not synchronize during start | SPN 636:FMI 8. Cranking RPM above 90 and more than 4 cranking revolutions without sync. | Warning | Check CKP sensor |
| DTC 24 | Exhaust cam position error | SPN 520801:FMI 7 | Warning | |
| DTC 87 | Fuel pressure lower than expected | SPN 94:FMI 1. Fuel Pressure is less than 40 psia for 2.0 seconds. MIL on during fault. Forced idle enabled. | Warning | Check fuel pressure regulation by ECM via PWM fuel pump |
| DTC 88 | Fuel pressure higher than expected | SPN 94:FMI 0. Fuel Pressure greater than 90 psia for 2.0 seconds. MIL on during fault. Forced idle enabled. | Warning | Check fuel rail pressure with DST and manual gauge; check for short to ground in fuel pump ground circuit; check OEM fuel hoses |
| DTC 91 | FP low voltage | SPN 94:FMI 4. Fuel pressure sensor voltage less than 0.2v for greater than 1 second. Adaptive Learn disabled. Forced idle enabled. | Warning | Check sensor/circuit; consult OEM wiring |
| DTC 92 | FP high voltage | SPN 94:FMI 3. Fuel pressure sensor voltage greater than 4.8v for greater than 1 second. Adaptive Learn disabled. Forced idle enabled. | Warning | Check sensor/circuit |
| DTC 107 | MAP voltage low | SPN 106:FMI 4. MAP voltage less than 0.050 with throttle position greater than 2.0% and engine RPM less than 3000. MIL-ON, Adaptive-Disabled. | Warning | Check MAP sensor connector C006, 5V reference pin 3 and signal pin 4; check continuity to ECM pins 7, 19, 20 |
| DTC 108 | MAP pressure high | SPN 106:FMI 16. MAP greater than 17.00 psia with TPS less than 8.0% and engine rpm greater than 800. MIL-ON, Adaptive Learn disabled. | Warning | Check MAP sensor connector C006, mechanical vacuum connection; check continuity to ECM |
| DTC 111 | IAT higher than expected stage 1 | SPN 105:FMI 15. Intake Air Temperature greater than 200 degrees F. with engine rpm greater than 600, present for minimum 60 seconds. MIL-ON, Adaptive-Disabled, Derate level 1. | Warning | Ensure air inlet not obstructed; inspect air inlet system for cracks or breaks |
| DTC 112 | IAT voltage low | SPN 105:FMI 4. IAT Sensor Voltage less than 0.050. MIL-ON during active fault, Adaptive-Disabled. | Warning | Check TMAP sensor; check continuity between TMAP pins and ECM |
| DTC 113 | IAT voltage high | SPN 105:FMI 3. IAT Sensor Voltage greater than 4.950 volts. MIL-ON during active fault, Adaptive-Disabled. | Warning | Check TMAP sensor connector C006; jump pins 1 and 2; check continuity to ECM pins 39, 20 |
| DTC 116 | ECT higher than expected stage 1 | SPN 110:FMI 15. Engine Coolant Temperature greater than 215 degrees F. for greater than 5 seconds. MIL-On, Power derate (level 2), Adaptive-Disabled. | Warning | Power derate level two enforced limiting maximum throttle position to 20% |
| DTC 117 | ECT voltage low | SPN 110:FMI 4. ECT sensor voltage less than 0.050. MIL-ON during active fault, Adaptive-Disabled. | Warning | Check ECT sensor connector C007; check continuity to ECM |
| DTC 118 | ECT voltage high | SPN 110:FMI 3. ECT sensor voltage exceeds 4.950 volts. MIL-ON during active fault, Adaptive-Disabled. | Warning | Check ECT sensor resistance vs temperature chart; check connector pins A and B; check ECM pins 40 and 20 |
| DTC 121 | TPS1-2 lower than expected | SPN 51:FMI 1. TPS 1 20% lower than TPS 2. MIL-ON for remainder of key on cycle, Engine shutdown. | Shutdown | Check TPS 1 and TPS 2 voltages; disconnect electronic throttle connector C017; replace electronic throttle |
| DTC 122 | TPS1 voltage low | SPN 51:FMI 4. TPS sensor less than 0.200 volts. MIL-ON during active fault, Engine shutdown. | Shutdown | Check TPS 1 voltage; jump 5V reference pin 3 and TPS 1 signal pin 6; replace electronic throttle |
| DTC 123 | TPS1 voltage high | SPN 51:FMI 3. TPS sensor voltage exceeds 4.800 volts. MIL-ON during active fault, Engine shutdown. | Shutdown | Check TPS 1 voltage; replace electronic throttle |
| DTC 127 | IAT higher than expected stage 2 | SPN 105:FMI 0. Intake Air Temperature greater than 210 degrees F. with engine speed greater than 600 rpm, active for 120 seconds. MIL-ON, Engine will shutdown. | Shutdown | Ensure air inlet not obstructed; inspect air inlet system |
| DTC 129 | BP pressure low | SPN 108:FMI 1. BP less than 8.30 psia. MIL-ON for active fault, Adaptive-Disabled. | Warning | Check TMAP sensor connector; jump 5V reference pin 3 and MAP signal pin 4; check continuity |
| DTC 134 | EGO1 open / lazy | SPN 724:FMI 10. EGO 1 pre catalyst persistently cold for more than 120 seconds. MIL-ON, Adaptive-Disabled, Closed Loop-Disabled. | Warning | Check EGO 1 connector C005; check heater voltage between pins C and D; replace EGO 1 sensor |
| DTC 140 | EGO3 open / lazy | SPN 520209:FMI 10 | Warning | |
| DTC 154 | EGO2 open / lazy | SPN 520208:FMI 10. EGO 2 pre cat open/lazy. | Warning | |
| DTC 160 | EGO4 open / lazy | SPN 520210:FMI 10 | Warning | |
| DTC 171 | Adaptive-learn gasoline bank1 high | SPN 520200:FMI 0. Adaptive multiplier out of range greater than 30%. MIL-ON. ECM detects lean condition. | Warning | Check air intake duct, air filter, EGO 1 sensor wiring, ECM grounds, fuel system diagnostics |
| DTC 172 | Adaptive-learn gasoline bank1 low | SPN 520200:FMI 1. Adaptive multiplier out of range greater than -30%. MIL-ON. ECM detects rich condition. | Warning | Check fuel pressure, injectors, fuel quality, air filter |
| DTC 174 | Adaptive-learn gasoline bank2 high | SPN 520201:FMI 0 | Warning | |
| DTC 175 | Adaptive-learn gasoline bank2 low | SPN 520201:FMI 1 | Warning | |
| DTC 182 | FT low voltage | SPN 174:FMI 4. Gasoline fuel temperature sensor voltage lower than .05v for 5 seconds or greater; fuel temperature -35F or less. MIL-On for active fault and 2 seconds after. Adaptive Learn disabled. | Warning | Inspect the fuel temperature for extreme cold |
| DTC 183 | FT high voltage | SPN 174:FMI 3. Gasoline fuel temperature sensor voltage greater than 4.95v for 5 seconds or greater; fuel temperature 130F or higher. MIL-On for active fault and 2 seconds after. Adaptive Learn disabled. | Warning | Inspect the fuel temperature for extreme hot temperatures |
| DTC 187 | Gaseous fuel temperature sender low voltage | SPN 520240:FMI 4 | Warning | |
| DTC 188 | Gaseous fuel temperature sender high voltage | SPN 520240:FMI 3 | Warning | |
| DTC 217 | ECT higher than expected stage 2 | SPN 110:FMI 0. Engine Coolant Temperature greater than 225 degrees F. for greater than 1 second while engine above 600 rpms. MIL-On, Engine will shutdown. | Shutdown | |
| DTC 219 | RPM higher than max allowed govern speed | SPN 515:FMI 15. Engine rpm greater than 2,850; fault active for 2 or more seconds. MIL-ON during active fault. | Warning | Check ECM service part number calibration; check mechanical operation of throttle; check for manifold vacuum leaks |
| DTC 221 | TPS1-2 higher than expected | SPN 51:FMI 0. TPS 1 20% higher than TPS2. MIL-ON for remainder of key on cycle, Engine shutdown. | Shutdown | Check TPS 1 and TPS 2; replace electronic throttle |
| DTC 222 | TPS2 voltage low | SPN 520251:FMI 4. TPS 2 sensor voltage less than 0.200 volts. MIL-ON during active fault, Engine will Shutdown. | Shutdown | Check TPS 2 voltage; jump 5V reference pin 3 and TPS 2 signal pin 5; replace electronic throttle |
| DTC 223 | TPS2 voltage high | SPN 520251:FMI 3. TPS 2 sensor exceeds 4.800 volts. MIL-ON during active fault, Engine will shutdown. | Shutdown | Check TPS 2 voltage; replace electronic throttle |
| DTC 234 | Boost control overboost failure | SPN 1692:FMI 0 | Warning | |
| DTC 236 | TIP active | SPN 1692:FMI 2 | Warning | |
| DTC 237 | TIP low voltage | SPN 1127:FMI 4 | Warning | |
| DTC 238 | TIP high voltage | SPN 1127:FMI 3 | Warning | |
| DTC 261 | Injector 1 open or short to ground | SPN 651:FMI 5. Injector driver 1 (cyl 1) open or short to ground. Low side voltage less than 4.0 volts when injector Off; battery voltage above 9.0 volts. MIL Light on, Closed Loop and Adaptive Learn disabled. Driver assigned by firing order (1-3-4-2). | Warning | Check wiring and injector resistance; replace injector if out of specification or infinite reading |
| DTC 262 | Injector 1 coil shorted | SPN 651:FMI 6. Low side voltage greater than 4.0 volts when injector On; battery voltage less than 16.0 volts. MIL Light on, Closed Loop and Adaptive Learn disabled. | Warning | Check wiring and injector resistance; replace injector if out of specification |
| DTC 264 | Injector 2 open or short to ground | SPN 264(652):FMI 5. Injector driver 2 (Cyl 3) open or short to ground. | Warning | Check wiring and injector resistance |
| DTC 265 | Injector 2 coil shorted | SPN 652:FMI 6. Injector driver 2 (Cyl 3) Coil Shorted. | Warning | Check wiring and injector resistance |
| DTC 267 | Injector 3 open or short to ground | SPN 653:FMI 5. Injector driver 3 (Cyl 4) open or short to ground. | Warning | Check wiring and injector resistance |
| DTC 268 | Injector 3 coil shorted | SPN 653:FMI 6. Injector driver 3 (Cyl 4) Coil Shorted. | Warning | Check wiring and injector resistance |
| DTC 270 | Injector 4 open or short to ground | SPN 654:FMI 5. Injector driver 4 (Cyl 2) open or short to ground. | Warning | Check wiring and injector resistance |
| DTC 271 | Injector 4 coil shorted | SPN 654:FMI 6. Injector driver 4 (Cyl 2) Coil Shorted. | Warning | Check wiring and injector resistance |
| DTC 299 | Boost control underboost failure | SPN 1692:FMI 1 | Warning | |
| DTC 301 | Cylinder 1 emissions/catalyst damaging misfire | SPN 1323:FMI 31 | Warning | |
| DTC 302 | Cylinder 2 emissions/catalyst damaging misfire | SPN 1324:FMI 31 | Warning | |
| DTC 303 | Cylinder 3 emissions/catalyst damaging misfire | SPN 1325:FMI 31 | Warning | |
| DTC 304 | Cylinder 4 emissions/catalyst damaging misfire | SPN 1326:FMI 31 | Warning | |
| DTC 305 | Cylinder 5 emissions/catalyst damaging misfire | SPN 1327:FMI 31 | Warning | |
| DTC 306 | Cylinder 6 emissions/catalyst damaging misfire | SPN 1328:FMI 31 | Warning | |
| DTC 307 | Cylinder 7 emissions/catalyst damaging misfire | SPN 1329:FMI 31 | Warning | |
| DTC 308 | Cylinder 8 emissions/catalyst damaging misfire | SPN 1330:FMI 31 | Warning | |
| DTC 326 | Knock1 excessive or erratic signal | SPN 731:FMI 2 | Warning | |
| DTC 327 | Knock1 sensor open or not present | SPN 731:FMI 4 | Warning | |
| DTC 331 | Knock2 excessive or erratic signal | SPN 520241:FMI 2 | Warning | |
| DTC 332 | Knock2 sensor open or not present | SPN 520241:FMI 4 | Warning | |
| DTC 336 | CRANK input signal noise | SPN 636:FMI 2. Crankshaft Position sensor. 1 invalid crank re-sync in less than 800 ms. Adaptive disabled, MIL on during active fault. | Warning | Check ECM ground terminals C010, C022, C023; check CKP sensor connector C015; check continuity to ECM pins 22 and 21; replace CKP sensor |
| DTC 337 | Crank signal loss | SPN 636:FMI 4. Crankshaft position sensor. 6 cam pulse signals without crankshaft activity. MIL on during active fault, Adaptive disabled. | Warning | Check ECM ground terminals; check CKP sensor connector C015; check continuity to ECM pins 22 and 21; replace CKP sensor |
| DTC 341 | CAM input signal noise | SPN 723:FMI 2. Camshaft position sensor. 1 invalid cam re-sync in 700ms or less. Adaptive Learn disabled, MIL-ON. | Warning | Check ECM ground terminal C010; check CMP sensor connector C016; check continuity to ECM pins 24 and 23; replace CMP sensor |
| DTC 342 | Loss of CAM input signal | SPN 723:FMI 4. No cam pulse in 2.5 cycles with engine speed greater than 100 rpm. MIL-ON for active fault, Adaptive-Disabled. | Warning | Check ECM ground terminal C010; check CMP sensor connector C016; check continuity to ECM pins 24 and 23; replace CMP |
| DTC 359 | Fuel run-out longer than expected | SPN 1239:FMI 7. LPG lock-off valve. Engine run down time greater than 20 seconds. MIL-ON. | Warning | Check LPG shut off solenoid connector C003; check voltage across terminals A and B; replace the LPG shut off solenoid |
| DTC 420 | Catalyst inactive on gasoline (Bank 1) | SPN 520211:FMI 10. EGO 1 signal = EGO 2 signal for 100 updates. MIL-On during active fault and for 1 second after. Adaptive- Disabled. | Warning | Diagnose any other troubles; check for and eliminate exhaust leaks; check catalyst muffler |
| DTC 430 | Catalyst inactive on gasoline (Bank 2) | SPN 520212:FMI 10 | Warning | |
| DTC 502 | Roadspeed input loss of signal | SPN 84:FMI 1. Road speed input less than 0.1 km/hr; fault active for 5.0 seconds; engine speed greater than 1,500 rpms; MAP pressure greater than 10.00 PSIA; SPDF signal indicates vehicle is moving. MIL light on during fault, Power Derate 2 enabled. | Warning | Check continuity between terminal 25 at GCP connector and Pin N of VIC1; check pins for spread terminals; replace GCP |
| DTC 508 | IAC ground short | SPN 520252:FMI 6 | Warning | |
| DTC 509 | IAC coil open/short | SPN 520252:FMI 5 | Warning | |
| DTC 520 | Oil pressure sender low pressure stage 1 | SPN 100:FMI 18. Engine speed less than 1200 rpm and oil pressure less than 6 psi for 5 or more seconds; or engine speed greater than 1450 rpm and oil pressure less than 8 psi for 5 or more seconds. MIL is active. | Warning | Verify engine oil pressure with mechanical gauge; check 5V reference at sensor terminal B and ECM; check signal at terminal C and ECM pin 53 |