MTU -20 V 4000 G83 troubleshooting: 84 fault codes and symptom-cause-remedy entries from the manufacturer's own service documentation.
MTU -20 V 4000 G83 — full specs, parts & maintenance.
| Code | Meaning | Cause | Remedy |
|---|---|---|---|
| SEO03 nd11 231 | High Temperature | Contact Service. | |
| 003 | Fuel temperature too high. | Contact Service. | |
| 004 | Fuel temperature too high; engine shutdown. | Contact Service. | |
| 005 | Charge-air temperature too high. | Reduce power, Check intercooler. | |
| 006 | Charge-air temperature too high; engine shutdown. | Reduce power, Check intercooler. | |
| 009 | Coolant temperature in intercooler too high. | Reduce power. | |
| 010 | Coolant temperature in intercooler too high; engine shutdown. | Reduce power. | |
| 015 | Lube oil pressure too low. | Contact Service. | |
| 016 | Lube oil pressure too low; engine shutdown. | Check oil level, top up as necessary (> Page 169). Attempt to restart engine (-» Page 55). | |
| 019 | Exhaust gas temperature (A-side) too high. | Check cabling (— Page 194), Contact Service. | |
| 020 | Exhaust gas temperature (A-side) too high; engine shutdown. | Check cabling (— Page 194), Contact Service. | |
| 021 | Exhaust gas temperature (B-side) too high. | Check cabling (— Page 194), Contact Service. | |
| 022 | Exhaust gas temperature (B-side) too high; engine shutdown. | Check cabling (— Page 194), Contact Service. | |
| 023 | Coolant level too low. | Check coolant level in expansion tank (— Page 176). | |
| 025 | Oil filter differential pressure too high. | Replace oil filter (— Page 173). | |
| 027 | Leak-fuel level too high. | Check fuel system, Contact Service. | |
| 029 | Idle speed of ETC 2 too high. | Contact Service. | |
| 030 | Engine Speed reduced. | Acknowledge alarm, Attempt to restart engine. | |
| 031 | Speed of primary turbocharger too high. | Contact Service. | |
| 33 | Fuel filter differential pressure too high. | Replace fuel filter (— Page 153). | |
| 036 | HI ETC 2 Overspeed | Reduce power. Contact Service. | |
| 037 | SS ETC 2 Overspeed | Reduce power. Contact Service. | |
| 038 | AL ETC Speed Deviation | Synchronization fault between primary turbocharger and one of the secondary turbochargers. | Reduce power. Contact Service. |
| 039 | AL ETC 2 Cutin Failure | Reduce power. Contact Service. | |
| 044 | LO Coolant Level Intercooler | Check coolant level (— Page 184). | |
| 051 | HI T-Lube Oil | Reduce power. | |
| 052 | SS T-Lube Oil | Reduce power. Check engine oil level (— Page 169). | |
| 057 | LOP-Coolant | Check coolant circuit. | |
| 058 | SS P-Coolant | Automatic engine shutdown. Check coolant level (— Page 176). | |
| 059 | SS T-Coolant L3 | Allow engine to cool down; Check coolant cooler, clean if necessary. Contact Service. | |
| 060 | SS T-Coolant L4 | Allow engine to cool down; Check coolant cooler, clean if necessary. Contact Service. | |
| 063 | HI P-Crankcase | Reduce power. Replace oil separator element (— Page 138). | |
| 064 | SS P-Crankcase | Replace oil separator element (— Page 138). Contact Service. | |
| 065 | LO P-Fuel | Check fuel lines for leaks. Clean fuei prefilter (— Page 154). Flush fuel prefilter (+ Page 158). Replace filter element of fuel prefilter (> Page 160). Replace fuel filter (— Page 153). | |
| 066 | SS P-Fuel | Check fuel lines for leaks. Clean fuel prefilter (— Page 154). Flush fuel prefilter (—+ Page 158). Replace filter element of fuel prefilter (— Page 160). Replace fuel filter (=> Page 153). | |
| 067 | Hi T-Coolant | Reduce power. | |
| 068 | SS T-Coolant | Allow engine to cool down; Check coolant cooler, clean if necessary. Restart engine (— Page 59) Contact Service. | |
| 081 | AL Rail Leakage | Contact Service. | |
| 082 | HI P-Fuel (Common Rail) | Contact Service. | |
| 083 | LO P-Fuel (Common Rail) | Contact Service. | |
| 085 | HI T-Recirculation | Reduce power. | |
| 089 | SS Engine Speed too Low | Check for additional messages. | |
| 090 | SS Starter Speed Not Reached | Contact Service. | |
| 091 | SS Release Speed Not Reached | Contact Service. | |
| 093 | SS T-Preheat | Check preheater. | |
| 094 | LO T-Preheat | Check preheater. | |
| 095 | AL Prelubrication Fault | Check oil priming system. | |
| 102 | AL Consumption Meter Faulty | Contact Service. | |
| 104 | AL Eng Hours Counter Defect | ||
| 442 - AL L2 P-Aux 1 | Pressure signal of Aux 1 has exceeded / not attained limit value 2, depending on configuration. | Sensor defect of injector power stage; internal fault of engine governor. | Replace ECU. |
| 445 | Ambient air pressure sensor faulty. | Replace ECU. | |
| 448 | Charge-air pressure too high. | Contact Service. | |
| 450 | Input signal for idle/end torque faulty; short circuit or wire break. | Check signal transmitter and cabling, replace as necessary. Error cleared after restarting the engine. | |
| 454 | Power reduction is active. | Note further fault messages. Determine and rectify reason for power reduction. | |
| 460 | EMU exhaust gas temperature value too high. | Check cabling. Contact Service. | |
| 461 | EMU exhaust gas temperature value too low. | Check cabling. Contact Service. | |
| 462 | EMU coolant temperature value too high / low. | Check configuration with DiaSys. | |
| 464 - SD P-AUX 1 | Analog pressure input signal for Aux 1 faulty; short circuit or wire break. | Check pressure transmitter and cabling, replace as necessary. Error cleared after restarting the engine. | |
| 467 - AL L2 T-Aux 1 | Temperature signal of Aux 1 has exceeded / not attained limit value 2, depending on configuration. | Determine and rectify reason for limit value violation. | |
| 468 - SD T-AUX 1 | Analog input for Aux 1 temperature faulty. | Replace ECU. | |
| 469 - SD AUX 1 | Analog input signal for Aux 1 faulty; short circuit or wire break. | Check signal transmitter and cabling, replace as necessary. | |
| 470 | Temperature sensor for ECU faulty; short circuit or wire break. | Check sensor and cabling, replace as necessary. Error cleared after restarting the engine. | |
| 471 -- SD Coil Current | Control circuit for suction restrictor faulty; short circuit or wire break. | Check sensor and cabling, replace as necessary. Error cleared after restarting the engine. | |
| 472 | Engine shutdown, since all shutdown channels have 'sensor faulty’. | Check cabling. Contact Service. | |
| 473 - AL Cabling PWM_CM2 | Cable break or short circuit on channel PWM_CM2. | Check cabling. Contact Service. | |
| 474 | Cable break or short circuit on channel FO. | Check cabling. Contact Service. | |
| 475 | Tripped by crash recorder triggering due to engine shutdown. | Determine and rectify cause of triggering / engine shutdown. | |
| 476 | Crash recorder initialization error. | Check setting with DiaSys. | |
| 478 | Combined alarm YELLOW from plant. | Note further fault messages. | |
| 479 | Combined alarm RED from plant. | Note further fault messages. | |
| 482 | Exhaust temperature sensor on A-side faulty; short circuit or wire break. | Check sensor and cabling (B4.23), replace as necessary. | |
| 484 | Exhaust gas temperature (C-side) too high. | Reduce power. Contact Service. | |
| 485 | Exhaust gas temperature (C-side} too high. | Reduce power. | |
| 99 | Lube-oil temperature before engine, shutdown | ||
| 101 | Lube-oil temperature before engine, shutdown | ||
| 401 | Lube oil pressure before engine, shutdown | ||
| SEO03 | Nd11 231 | Contact Service. | |
| 026 | HI P-Diff Lube Oil | Replace oil filter (— Page 173). | |
| 032 | SS ETC 1 overspeed | 1. Automatic power reduction by engine control system. 2. Check air filters (— Page 164). | |
| 033 | HI P-Diff-Fuel | Replace fuel filter (— Page 153). | |
| 034 | SS P-Diff-Fuel | Replace fuel filter (— Page 153). | |
| 086 | HI T-Recirculation | Reduce power. | |
| 092 | SS Starter Speed Not Reached | Contact Service. |
| Symptom |
|---|
| External engine protection function is active. Monitoring of plant signal by ECU is active (plant-side). Check plant Signal. |
Fault codes and symptom→remedy steps extracted from this model’s service/owner documentation; verify against the official manual before servicing.
Documented causes: Synchronization fault between primary turbocharger and one of the secondary turbochargers.. See the table for the matching fixes.
Documented causes: Sensor defect of injector power stage; internal fault of engine governor.. See the table for the matching fixes.