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MTU Friedrichshafen Fault Codes

87 MTU Friedrichshafen generator fault/alarm codes with symptom, cause and remedy — compiled from MTU Friedrichshafen service and controller documentation.

Fault / alarm codes

87
CodeMeaning / symptomCauseRemedy Models affected
003Preliminary warning: fuel temperature too high.Contact Service.MTU Friedrichshafen 12 V 4000 G23, MTU Friedrichshafen 12 V 4000 G43, MTU Friedrichshafen 12 V 4000 G63, MTU Friedrichshafen 12 V 4000 G83, MTU Friedrichshafen 12 V 4000 Gx3, MTU Friedrichshafen 12V4000 G23
004Main warning: fuel temperature too high; engine stop.Contact Service.MTU Friedrichshafen 12 V 4000 G23, MTU Friedrichshafen 12 V 4000 G43, MTU Friedrichshafen 12 V 4000 G63, MTU Friedrichshafen 12 V 4000 G83, MTU Friedrichshafen 12 V 4000 Gx3, MTU Friedrichshafen 12V4000 G23
005Preliminary warning: charge-air temperature too high.Reduce power. Check intercooler.MTU Friedrichshafen 12 V 4000 G23, MTU Friedrichshafen 12 V 4000 G43, MTU Friedrichshafen 12 V 4000 G63, MTU Friedrichshafen 12 V 4000 G83, MTU Friedrichshafen 12 V 4000 Gx3, MTU Friedrichshafen 12V4000 G23
006Main warning: charge-air temperature too high; engine stop.Reduce power. Check intercooler.MTU Friedrichshafen 12 V 4000 G23, MTU Friedrichshafen 12 V 4000 G43, MTU Friedrichshafen 12 V 4000 G63, MTU Friedrichshafen 12 V 4000 G83, MTU Friedrichshafen 12 V 4000 Gx3, MTU Friedrichshafen 12V4000 G23
009Preliminary warning: coolant Intercooler temperature in intercooler too low.Reduce power.MTU Friedrichshafen 12 V 4000 G23, MTU Friedrichshafen 12 V 4000 G63, MTU Friedrichshafen 12 V 4000 Gx3, MTU Friedrichshafen 12V4000 G23, MTU Friedrichshafen 16 V 4000 G23, MTU Friedrichshafen 20 V 4000 G23
010Main warning: charge-air coolant temperature too high; engine stop.Reduce power.MTU Friedrichshafen 12 V 4000 G23, MTU Friedrichshafen 12 V 4000 G63, MTU Friedrichshafen 12 V 4000 Gx3, MTU Friedrichshafen 12V4000 G23, MTU Friedrichshafen 16 V 4000 G23, MTU Friedrichshafen 20 V 4000 G23
015Preliminary warning: lube oil pressure too low.Check oil level, top up as necessary (— Page 146).MTU Friedrichshafen 12 V 4000 G23, MTU Friedrichshafen 12 V 4000 G43, MTU Friedrichshafen 12 V 4000 G63, MTU Friedrichshafen 12 V 4000 G83, MTU Friedrichshafen 12 V 4000 Gx3, MTU Friedrichshafen 12V4000 G23
016Lube oil pressure too low (2nd limit value)Check engine-oil level and top up, if required automatic engine shutdown Try to re-start the engine Contact Service.MTU Friedrichshafen 12 V 4000 G23, MTU Friedrichshafen 12 V 4000 G43, MTU Friedrichshafen 12 V 4000 G63, MTU Friedrichshafen 12 V 4000 G83, MTU Friedrichshafen 12 V 4000 Gx3, MTU Friedrichshafen 12V4000 G23
019HI T-Exhaust ACheck cabling (→ Page 155).MTU Friedrichshafen 12 V 4000 G23, MTU Friedrichshafen 12 V 4000 G43, MTU Friedrichshafen 12 V 4000 G63, MTU Friedrichshafen 12 V 4000 G83, MTU Friedrichshafen 12 V 4000 Gx3, MTU Friedrichshafen 12V4000 G23
020SS T-Exhaust AContact Service.MTU Friedrichshafen 12 V 4000 G23, MTU Friedrichshafen 12 V 4000 G43, MTU Friedrichshafen 12 V 4000 G63, MTU Friedrichshafen 12 V 4000 G83, MTU Friedrichshafen 12 V 4000 Gx3, MTU Friedrichshafen 12V4000 G23
021HI T-Exhaust BCheck cabling (→ Page 155).MTU Friedrichshafen 12 V 4000 G23, MTU Friedrichshafen 12 V 4000 G43, MTU Friedrichshafen 12 V 4000 G63, MTU Friedrichshafen 12 V 4000 G83, MTU Friedrichshafen 12 V 4000 Gx3, MTU Friedrichshafen 12V4000 G23
022SS T-Exhaust BContact Service.MTU Friedrichshafen 12 V 4000 G23, MTU Friedrichshafen 12 V 4000 G43, MTU Friedrichshafen 12 V 4000 G63, MTU Friedrichshafen 12 V 4000 G83, MTU Friedrichshafen 12 V 4000 Gx3, MTU Friedrichshafen 12V4000 G23
023Engine coolant level too low LEVEL (— Page 153)Check coolant level and top up, if requiredMTU Friedrichshafen 12 V 4000 G23, MTU Friedrichshafen 12 V 4000 G43, MTU Friedrichshafen 12 V 4000 G63, MTU Friedrichshafen 12 V 4000 G83, MTU Friedrichshafen 12 V 4000 Gx3, MTU Friedrichshafen 12V4000 G23
024SS Coolant LevelCheck coolant level.MTU Friedrichshafen 12 V 4000 G23, MTU Friedrichshafen 12 V 4000 G43, MTU Friedrichshafen 12 V 4000 G63, MTU Friedrichshafen 12 V 4000 G83, MTU Friedrichshafen 12 V 4000 Gx3, MTU Friedrichshafen 12V4000 G23
025HI P-Diff. Lube OilReplace oil filter (— Page 173).MTU Friedrichshafen 12 V 4000 G23, MTU Friedrichshafen 12 V 4000 G43, MTU Friedrichshafen 12 V 4000 G63, MTU Friedrichshafen 12 V 4000 G83, MTU Friedrichshafen 12 V 4000 Gx3, MTU Friedrichshafen 12V4000 G23
026HI P-Diff. Lube OilReplace oil filter (— Page 173).MTU Friedrichshafen 12 V 4000 G23, MTU Friedrichshafen 12 V 4000 G43, MTU Friedrichshafen 12 V 4000 G63, MTU Friedrichshafen 12 V 4000 G83, MTU Friedrichshafen 12 V 4000 Gx3, MTU Friedrichshafen 12V4000 G23
027HI Leak Fuel Level1. Check fuel system. 2. Contact Service.MTU Friedrichshafen 12 V 4000 G23, MTU Friedrichshafen 12 V 4000 G43, MTU Friedrichshafen 12 V 4000 G63, MTU Friedrichshafen 12 V 4000 G83, MTU Friedrichshafen 12 V 4000 Gx3, MTU Friedrichshafen 12V4000 G23
029HI ETC 2 idle speedContact Service.MTU Friedrichshafen 12 V 4000 G23, MTU Friedrichshafen 12 V 4000 G63, MTU Friedrichshafen 12 V 4000 Gx3, MTU Friedrichshafen 12V4000 G23, MTU Friedrichshafen 16 V 4000 G23, MTU Friedrichshafen 20 V 4000 G23
030Engine overspeed; automatic engine shutdownAcknowledge alarm. Try to re-start the engine Contact Service.MTU Friedrichshafen 12 V 4000 G23, MTU Friedrichshafen 12 V 4000 G63, MTU Friedrichshafen 12 V 4000 Gx3, MTU Friedrichshafen 12V4000 G23, MTU Friedrichshafen 16 V 4000 G23, MTU Friedrichshafen 20 V 4000 G23
031HI ETC 1 overspeedContact Service.MTU Friedrichshafen 12 V 4000 G23, MTU Friedrichshafen 12 V 4000 G63, MTU Friedrichshafen 12 V 4000 Gx3, MTU Friedrichshafen 12V4000 G23, MTU Friedrichshafen 16 V 4000 G23, MTU Friedrichshafen 20 V 4000 G23
032SS ETC 1 overspeed1. Automatic power reduction by engine control system. 2. Check air filters (— Page 164).MTU Friedrichshafen 12 V 4000 G23, MTU Friedrichshafen 12 V 4000 G63, MTU Friedrichshafen 12 V 4000 Gx3, MTU Friedrichshafen 12V4000 G23, MTU Friedrichshafen 16 V 4000 G23, MTU Friedrichshafen 20 V 4000 G23
033HI P-Diff-FuelReplace fuel filter (— Page 153).MTU Friedrichshafen 20 V 4000 G23, MTU Friedrichshafen 20 V 4000 G43, MTU Friedrichshafen 20 V 4000 G63, MTU Friedrichshafen 20V 4000, MTU Friedrichshafen 20V 4000 Gx3
034SS P-Diff-FuelReplace fuel filter (— Page 153).MTU Friedrichshafen 20 V 4000 G23, MTU Friedrichshafen 20 V 4000 G43, MTU Friedrichshafen 20 V 4000 G63, MTU Friedrichshafen 20V 4000, MTU Friedrichshafen 20V 4000 Gx3
036HI ETC 2 Overspeed1. Reduce power. 2. Contact Service.MTU Friedrichshafen 12 V 4000 G23, MTU Friedrichshafen 12 V 4000 G63, MTU Friedrichshafen 12 V 4000 Gx3, MTU Friedrichshafen 12V4000 G23, MTU Friedrichshafen 16 V 4000 G23, MTU Friedrichshafen 20 V 4000 G23
037SS ETC 2 Overspeed1. Reduce power. 2. Contact Service.MTU Friedrichshafen 12 V 4000 G23, MTU Friedrichshafen 12 V 4000 G63, MTU Friedrichshafen 12 V 4000 Gx3, MTU Friedrichshafen 12V4000 G23, MTU Friedrichshafen 16 V 4000 G23, MTU Friedrichshafen 20 V 4000 G23
038AL ETC Speed Deviation1. Reduce power. 2. Contact Service.MTU Friedrichshafen 12 V 4000 G23, MTU Friedrichshafen 12 V 4000 G63, MTU Friedrichshafen 12 V 4000 Gx3, MTU Friedrichshafen 12V4000 G23, MTU Friedrichshafen 16 V 4000 G23, MTU Friedrichshafen 20 V 4000 G23
039AL ETC 2 Cutin Failure1. Reduce power. 2. Contact Service.MTU Friedrichshafen 12 V 4000 G23, MTU Friedrichshafen 12 V 4000 G63, MTU Friedrichshafen 12 V 4000 Gx3, MTU Friedrichshafen 12V4000 G23, MTU Friedrichshafen 16 V 4000 G23, MTU Friedrichshafen 20 V 4000 G23
044Charge-air coolant level too low INTERCOOLER (1st limit value)Check coolant level and top up, if requiredMTU Friedrichshafen 12 V 4000 G23, MTU Friedrichshafen 12 V 4000 G63, MTU Friedrichshafen 12 V 4000 Gx3, MTU Friedrichshafen 12V4000 G23, MTU Friedrichshafen 16 V 4000 G23, MTU Friedrichshafen 20 V 4000 G23
045Charge-air coolant level too low INTERCOOLER (2nd limit value)Check coolant level and top up, if required If fault occurs repeatedly: Contact Service.MTU Friedrichshafen 12 V 4000 G23, MTU Friedrichshafen 12 V 4000 G63, MTU Friedrichshafen 12V4000 G23
051Lube oil temperature too high (1st limit value)Reduce power. Change over to idle and contact Service.MTU Friedrichshafen 12 V 4000 G23, MTU Friedrichshafen 12 V 4000 G63, MTU Friedrichshafen 12 V 4000 Gx3, MTU Friedrichshafen 12V4000 G23, MTU Friedrichshafen 16 V 4000 G23, MTU Friedrichshafen 20 V 4000 G23
052Lube oil temperature too high (2nd limit value)Reduce power. Change over to idle and contact Service. If fault occurs repeatedly: Contact Service.MTU Friedrichshafen 12 V 4000 G23, MTU Friedrichshafen 12 V 4000 G63, MTU Friedrichshafen 12 V 4000 Gx3, MTU Friedrichshafen 12V4000 G23, MTU Friedrichshafen 16 V 4000 G23, MTU Friedrichshafen 20 V 4000 G23
057LO P-CoolantCheck coolant circuit.MTU Friedrichshafen 12 V 4000 G23, MTU Friedrichshafen 12 V 4000 G63, MTU Friedrichshafen 12 V 4000 Gx3, MTU Friedrichshafen 12V4000 G23, MTU Friedrichshafen 16 V 4000 G23, MTU Friedrichshafen 20 V 4000 G23
058SS P-Coolant1. Automatic engine shutdown. 2. Check coolant level (— Page 176).MTU Friedrichshafen 12 V 4000 G23, MTU Friedrichshafen 12 V 4000 G63, MTU Friedrichshafen 12 V 4000 Gx3, MTU Friedrichshafen 12V4000 G23, MTU Friedrichshafen 16 V 4000 G23, MTU Friedrichshafen 20 V 4000 G23
059SS T-Coolant L31. Allow engine to cool down; 2. Check coolant cooler, clean if necessary; 3. Contact Service.MTU Friedrichshafen 20 V 4000 G23, MTU Friedrichshafen 20 V 4000 G43, MTU Friedrichshafen 20 V 4000 G63, MTU Friedrichshafen 20V 4000, MTU Friedrichshafen 20V 4000 Gx3
060SS T-Coolant L41. Allow engine to cool down; 2. Check coolant cooler, clean if necessary; 3. Contact Service.MTU Friedrichshafen 20 V 4000 G23, MTU Friedrichshafen 20 V 4000 G43, MTU Friedrichshafen 20 V 4000 G63, MTU Friedrichshafen 20V 4000, MTU Friedrichshafen 20V 4000 Gx3
063HI P-Crankcase1. Reduce power. 2. Replace oil separator element (— Page 138).MTU Friedrichshafen 12 V 4000 G23, MTU Friedrichshafen 12 V 4000 G63, MTU Friedrichshafen 12 V 4000 Gx3, MTU Friedrichshafen 12V4000 G23, MTU Friedrichshafen 16 V 4000 G23, MTU Friedrichshafen 20 V 4000 G23
064SS P-Crankcase1. Replace oil separator element (— Page 138). 2. Contact Service.MTU Friedrichshafen 12 V 4000 G23, MTU Friedrichshafen 12 V 4000 G63, MTU Friedrichshafen 12 V 4000 Gx3, MTU Friedrichshafen 12V4000 G23, MTU Friedrichshafen 16 V 4000 G23, MTU Friedrichshafen 20 V 4000 G23
065Fuel supply pressure too low (ist limit value)Check fuel lines for leaks; repair defective lines. Clean fuel prefilter Flush fuel prefilter Replace filter element of fuel prefilter Replace fuel filter If fault is not rectified: Contact Service.MTU Friedrichshafen 12 V 4000 G23, MTU Friedrichshafen 12 V 4000 G63, MTU Friedrichshafen 12 V 4000 Gx3, MTU Friedrichshafen 12V4000 G23, MTU Friedrichshafen 16 V 4000 G23, MTU Friedrichshafen 20 V 4000 G23
066Fuel supply pressure too low (2nd limit value)Check fuel lines for leaks; repair defective lines. Clean fuel prefilter Flush fuel prefilter Replace filter element of fuel prefilter Replace fuel filter If fault is not rectified: Contact Service.MTU Friedrichshafen 12 V 4000 G23, MTU Friedrichshafen 12 V 4000 G63, MTU Friedrichshafen 12 V 4000 Gx3, MTU Friedrichshafen 12V4000 G23, MTU Friedrichshafen 16 V 4000 G23, MTU Friedrichshafen 20 V 4000 G23
067Coolant temperature too high (tst limit value)Reduce power. Change over to idle and warning contact Service.MTU Friedrichshafen 12 V 4000 G23, MTU Friedrichshafen 12 V 4000 G63, MTU Friedrichshafen 12 V 4000 Gx3, MTU Friedrichshafen 12V4000 G23, MTU Friedrichshafen 16 V 4000 G23, MTU Friedrichshafen 20 V 4000 G23
068Coolant temperature too high (2nd limit value)Allow the engine to cool down. Check coolant cooler (elements etc.) clean contaminated parts (see manufacturer’s documentation). Re-start the engine If fault occurs repeatedly: Contact Service.MTU Friedrichshafen 12 V 4000 G23, MTU Friedrichshafen 12 V 4000 G63, MTU Friedrichshafen 12 V 4000 Gx3, MTU Friedrichshafen 12V4000 G23, MTU Friedrichshafen 16 V 4000 G23, MTU Friedrichshafen 20 V 4000 G23
069Violation of first limit for external temperature channel 1 point, which is read via CAN busMTU Friedrichshafen 12 V 4000 G23, MTU Friedrichshafen 12 V 4000 G63, MTU Friedrichshafen 12V4000 G23
070Violation of second limit for external temperature channel 1 point, which is read via CAN busMTU Friedrichshafen 12 V 4000 G23, MTU Friedrichshafen 12 V 4000 G63, MTU Friedrichshafen 12V4000 G23
071Violation of first limit for external temperature channel 2 | (Depending on the corresponding measuring point, which is read via CAN bus)MTU Friedrichshafen 12 V 4000 G23, MTU Friedrichshafen 12 V 4000 G63, MTU Friedrichshafen 12V4000 G23
072Violation of second limit for external temperature channel 2 point, which is read via CAN busMTU Friedrichshafen 12 V 4000 G23, MTU Friedrichshafen 12 V 4000 G63, MTU Friedrichshafen 12V4000 G23
073Violation of first limit for external pressure channel 1 point, which is read via CAN busMTU Friedrichshafen 12 V 4000 G23, MTU Friedrichshafen 12 V 4000 G63, MTU Friedrichshafen 12V4000 G23
074Violation of second limit for external pressure channel 1 point, which is read via CAN busMTU Friedrichshafen 12 V 4000 G23, MTU Friedrichshafen 12 V 4000 G63, MTU Friedrichshafen 12V4000 G23
075Violation of first limit for external pressure channel 2 point, which is read via CAN busMTU Friedrichshafen 12 V 4000 G23, MTU Friedrichshafen 12 V 4000 G63, MTU Friedrichshafen 12V4000 G23
076Violation of second limit for external pressure channel 2 point, which is read via CAN busMTU Friedrichshafen 12 V 4000 G23, MTU Friedrichshafen 12 V 4000 G63, MTU Friedrichshafen 12V4000 G23
081AL Rail LeakageContact Service.MTU Friedrichshafen 20 V 4000 G23, MTU Friedrichshafen 20 V 4000 G43, MTU Friedrichshafen 20 V 4000 G63, MTU Friedrichshafen 20V 4000, MTU Friedrichshafen 20V 4000 Gx3
082HI P-Fuel (Common Rail)Contact Service.MTU Friedrichshafen 12 V 4000 G23, MTU Friedrichshafen 12 V 4000 G63, MTU Friedrichshafen 12 V 4000 Gx3, MTU Friedrichshafen 12V4000 G23, MTU Friedrichshafen 16 V 4000 G23, MTU Friedrichshafen 20 V 4000 G23
083LO P-Fuel (Common Rail)Contact Service.MTU Friedrichshafen 12 V 4000 G23, MTU Friedrichshafen 12 V 4000 G63, MTU Friedrichshafen 12 V 4000 Gx3, MTU Friedrichshafen 12V4000 G23, MTU Friedrichshafen 16 V 4000 G23, MTU Friedrichshafen 20 V 4000 G23
084HI P-Fuel (Common Rail pressure > reference value; DBR fuel limitation, start of injection readjusted towards late; suction restrictor of HP fuel block jamming or HP fuel control block wiring faulty.Contact Service.MTU Friedrichshafen 12 V 4000 G23, MTU Friedrichshafen 12 V 4000 G63, MTU Friedrichshafen 12 V 4000 Gx3, MTU Friedrichshafen 12V4000 G23, MTU Friedrichshafen 16 V 4000 G23, MTU Friedrichshafen G23R
085HI T-RecirculationReduce power.MTU Friedrichshafen 12 V 4000 G23, MTU Friedrichshafen 12 V 4000 G63, MTU Friedrichshafen 12 V 4000 Gx3, MTU Friedrichshafen 12V4000 G23, MTU Friedrichshafen 16 V 4000 G23, MTU Friedrichshafen 20 V 4000 G23
086HI T-RecirculationReduce power.MTU Friedrichshafen 20 V 4000 G23, MTU Friedrichshafen 20 V 4000 G43, MTU Friedrichshafen 20 V 4000 G63, MTU Friedrichshafen 20V 4000, MTU Friedrichshafen 20V 4000 Gx3
087AL Rail LeakageContact Service.MTU Friedrichshafen 12 V 4000 G23, MTU Friedrichshafen 12 V 4000 G63, MTU Friedrichshafen 12 V 4000 Gx3, MTU Friedrichshafen 12V4000 G23, MTU Friedrichshafen 16 V 4000 G23, MTU Friedrichshafen G23R
089SS Engine Speed too LowCheck for additional messages.MTU Friedrichshafen 20 V 4000 G23, MTU Friedrichshafen 20 V 4000 G43, MTU Friedrichshafen 20 V 4000 G63, MTU Friedrichshafen 20V 4000, MTU Friedrichshafen 20V 4000 Gx3
090SS Starter Speed Not ReachedContact Service.MTU Friedrichshafen 12 V 4000 G23, MTU Friedrichshafen 12 V 4000 G63, MTU Friedrichshafen 12 V 4000 Gx3, MTU Friedrichshafen 12V4000 G23, MTU Friedrichshafen 16 V 4000 G23, MTU Friedrichshafen 20 V 4000 G23
091SS Release Speed Not ReachedContact Service.MTU Friedrichshafen 12 V 4000 G23, MTU Friedrichshafen 12 V 4000 G63, MTU Friedrichshafen 12 V 4000 Gx3, MTU Friedrichshafen 12V4000 G23, MTU Friedrichshafen 16 V 4000 G23, MTU Friedrichshafen 20 V 4000 G23
092SS Starter Speed Not ReachedContact Service.MTU Friedrichshafen 12 V 4000 G23, MTU Friedrichshafen 12 V 4000 G63, MTU Friedrichshafen 12 V 4000 Gx3, MTU Friedrichshafen 12V4000 G23, MTU Friedrichshafen 16 V 4000 G23, MTU Friedrichshafen 20 V 4000 G23
093SS T-PreheatCheck preheater.MTU Friedrichshafen 12 V 4000 G23, MTU Friedrichshafen 12 V 4000 G63, MTU Friedrichshafen 12 V 4000 Gx3, MTU Friedrichshafen 12V4000 G23, MTU Friedrichshafen 16 V 4000 G23, MTU Friedrichshafen 20 V 4000 G23
094LO T-PreheatCheck preheater.MTU Friedrichshafen 12 V 4000 G23, MTU Friedrichshafen 12 V 4000 G63, MTU Friedrichshafen 12 V 4000 Gx3, MTU Friedrichshafen 12V4000 G23, MTU Friedrichshafen 16 V 4000 G23, MTU Friedrichshafen 20 V 4000 G23
095AL Prelubrication FaultCheck oil priming system.MTU Friedrichshafen 12 V 4000 G23, MTU Friedrichshafen 12 V 4000 G63, MTU Friedrichshafen 12 V 4000 Gx3, MTU Friedrichshafen 12V4000 G23, MTU Friedrichshafen 16 V 4000 G23, MTU Friedrichshafen 20 V 4000 G23
101Lube-oil temperature before engine, shutdownMTU Friedrichshafen 20 V 4000 G23, MTU Friedrichshafen 20 V 4000 G43, MTU Friedrichshafen 20 V 4000 G63, MTU Friedrichshafen 20V 4000, MTU Friedrichshafen 20V 4000 Gx3
102AL Consumption Meter FaultyContact Service.MTU Friedrichshafen 12 V 4000 G23, MTU Friedrichshafen 12 V 4000 G63, MTU Friedrichshafen 12 V 4000 Gx3, MTU Friedrichshafen 12V4000 G23, MTU Friedrichshafen 16 V 4000 G23, MTU Friedrichshafen 20 V 4000 G23
104AL Eng Hours Counter DefectContact Service.MTU Friedrichshafen 12 V 4000 G23, MTU Friedrichshafen 12 V 4000 G63, MTU Friedrichshafen 12 V 4000 Gx3, MTU Friedrichshafen 12V4000 G23, MTU Friedrichshafen 16 V 4000 G23, MTU Friedrichshafen 20 V 4000 G23
118LO ECU Supply VoltageCheck ECU supply voltage. Contact Service.MTU Friedrichshafen 12 V 4000 G23, MTU Friedrichshafen 12 V 4000 G63, MTU Friedrichshafen 12 V 4000 Gx3, MTU Friedrichshafen 12V4000 G23, MTU Friedrichshafen 16 V 4000 G23, MTU Friedrichshafen G23R
119LOLO ECU Supply VoltageCheck ECU supply voltage. Contact Service.MTU Friedrichshafen 12 V 4000 G23, MTU Friedrichshafen 12 V 4000 G63, MTU Friedrichshafen 12 V 4000 Gx3, MTU Friedrichshafen 12V4000 G23, MTU Friedrichshafen 16 V 4000 G23, MTU Friedrichshafen G23R
120HI ECU Supply VoltageCheck ECU supply voltage. Contact Service.MTU Friedrichshafen 12 V 4000 G23, MTU Friedrichshafen 12 V 4000 G63, MTU Friedrichshafen 12 V 4000 Gx3, MTU Friedrichshafen 12V4000 G23, MTU Friedrichshafen 16 V 4000 G23, MTU Friedrichshafen G23R
121HIH] ECU Supply VoltageCheck ECU supply voltage. Contact Service.MTU Friedrichshafen 12 V 4000 G23, MTU Friedrichshafen 12 V 4000 G63, MTU Friedrichshafen 12 V 4000 Gx3, MTU Friedrichshafen 12V4000 G23, MTU Friedrichshafen 16 V 4000 G23, MTU Friedrichshafen G23R
13415V POS ECU DEFECTReplace ECU.MTU Friedrichshafen 12 V 4000 G23, MTU Friedrichshafen 12 V 4000 G63, MTU Friedrichshafen 12 V 4000 Gx3, MTU Friedrichshafen 12V4000 G23, MTU Friedrichshafen 16 V 4000 G23, MTU Friedrichshafen G23R
13615V NEG ECU DEFECTContact Service.MTU Friedrichshafen 12 V 4000 G23, MTU Friedrichshafen 12 V 4000 G63, MTU Friedrichshafen 12 V 4000 Gx3, MTU Friedrichshafen 12V4000 G23, MTU Friedrichshafen 16 V 4000 G23, MTU Friedrichshafen G23R
142BANK1 ECU DEFECTReplace ECU.MTU Friedrichshafen 12 V 4000 G23, MTU Friedrichshafen 12 V 4000 G63, MTU Friedrichshafen 12 V 4000 Gx3, MTU Friedrichshafen 12V4000 G23, MTU Friedrichshafen 16 V 4000 G23, MTU Friedrichshafen G23R
144BANK2 ECU DEFECTReplace ECU.MTU Friedrichshafen 12 V 4000 G23, MTU Friedrichshafen 12 V 4000 G63, MTU Friedrichshafen 12 V 4000 Gx3, MTU Friedrichshafen 12V4000 G23, MTU Friedrichshafen 16 V 4000 G23, MTU Friedrichshafen G23R
150Li AD-TEST3 SUPPLYReplace ECU.MTU Friedrichshafen 12 V 4000 G23, MTU Friedrichshafen 12 V 4000 G63, MTU Friedrichshafen 12 V 4000 Gx3, MTU Friedrichshafen 12V4000 G23, MTU Friedrichshafen 16 V 4000 G23, MTU Friedrichshafen G23R
270 SOFrequency Input SD alarm configuration; frequency input faulty; short circuit or wire break.1. Check cabling. 2. Check setpoint speed transmitter.MTU Friedrichshafen 12 V 4000 G23, MTU Friedrichshafen 12 V 4000 G63, MTU Friedrichshafen 12V4000 G23
361 ALPower Stage Low SD alarm configuration; internal electronic fault (electronics possibly faulty: start ITS). If the ITS diagnosis result is “electronics OK1. Check solenoid valve cabling. 2. Replace ECU.MTU Friedrichshafen 12 V 4000 G23, MTU Friedrichshafen 12 V 4000 G63, MTU Friedrichshafen 12V4000 G23
362 ALPower Stage High SD alarm configuration; internal electronic fault (electronics possibly faulty: start ITS). If the ITS diagnosis result is “electronics OK1. Check solenoid valve cabling. 2. Replace ECU.MTU Friedrichshafen 12 V 4000 G23, MTU Friedrichshafen 12 V 4000 G63, MTU Friedrichshafen 12V4000 G23
363 ALStop Power Stage SD alarm configuration; internal electronic fault (electronics possibly faulty: start ITS). If the ITS diagnosis result is “electronics OK1. Check cabling. 2. Attempt to restart engine.MTU Friedrichshafen 12 V 4000 G23, MTU Friedrichshafen 12 V 4000 G63, MTU Friedrichshafen 12V4000 G23
365 ALStop MV-Wiring SD alarm configuration; injector Ground cabling fault. If bit"1.1020.021” is set, engine will be shut down as additional measure.1. Check cabling. 2. Attempt to restart engine.MTU Friedrichshafen 12 V 4000 G23, MTU Friedrichshafen 12 V 4000 G63, MTU Friedrichshafen 12V4000 G23
371 ALWiring TO 1 SD alarm configuration; short circuit or wire break on turbocharger transistor output 1 (TO 1).1. Check turbocharger valve/cabling, repair as necessary. 2. Replace ECU.MTU Friedrichshafen 12 V 4000 G23, MTU Friedrichshafen 12 V 4000 G63, MTU Friedrichshafen 12V4000 G23
372 ALWiring TO 2 SD alarm configuration; short circuit or wire break on recirculation transistor output 2 (TO 2).1. Check turbocharger valve/cabling, repair as necessary. 2. Replace ECU.MTU Friedrichshafen 12 V 4000 G23, MTU Friedrichshafen 12 V 4000 G63, MTU Friedrichshafen 12V4000 G23
373 ALWiring TO 3 SD alarm configuration; short circuit or wire break on transistor output 3 (TO 3)MTU Friedrichshafen 12 V 4000 G23, MTU Friedrichshafen 12 V 4000 G63, MTU Friedrichshafen 12V4000 G23
401Lube oil pressure before engine, shutdownMTU Friedrichshafen 20 V 4000 G23, MTU Friedrichshafen 20 V 4000 G43, MTU Friedrichshafen 20 V 4000 G63, MTU Friedrichshafen 20V 4000, MTU Friedrichshafen 20V 4000 Gx3
99Lube-oil temperature before engine, shutdownMTU Friedrichshafen 20 V 4000 G23, MTU Friedrichshafen 20 V 4000 G43, MTU Friedrichshafen 20 V 4000 G63, MTU Friedrichshafen 20V 4000, MTU Friedrichshafen 20V 4000 Gx3
ADECEngine governor ADEC (ECU 7) for Series 4000 genset engines - Fault messagesMTU Friedrichshafen 12 V 4000 G23, MTU Friedrichshafen 12 V 4000 G43, MTU Friedrichshafen 12 V 4000 G63, MTU Friedrichshafen 12 V 4000 G83, MTU Friedrichshafen 16 V 4000 G23, MTU Friedrichshafen 16 V 4000 G43
SEO03Nd11 231Contact Service.MTU Friedrichshafen 20 V 4000 G23, MTU Friedrichshafen 20 V 4000 G43, MTU Friedrichshafen 20 V 4000 G63, MTU Friedrichshafen 20V 4000, MTU Friedrichshafen 20V 4000 Gx3

Compiled from MTU Friedrichshafen service manuals and controller documentation. Cause/remedy shown where extracted; always verify against the manual for your exact model.

Common questions

What does MTU Friedrichshafen fault code 003 mean?

Preliminary warning: fuel temperature too high.. Remedy: Contact Service..

What does MTU Friedrichshafen fault code 004 mean?

Main warning: fuel temperature too high; engine stop.. Remedy: Contact Service..

What does MTU Friedrichshafen fault code 005 mean?

Preliminary warning: charge-air temperature too high.. Remedy: Reduce power. Check intercooler..

What does MTU Friedrichshafen fault code 006 mean?

Main warning: charge-air temperature too high; engine stop.. Remedy: Reduce power. Check intercooler..

What does MTU Friedrichshafen fault code 009 mean?

Preliminary warning: coolant Intercooler temperature in intercooler too low.. Remedy: Reduce power..

What does MTU Friedrichshafen fault code 010 mean?

Main warning: charge-air coolant temperature too high; engine stop.. Remedy: Reduce power..

What does MTU Friedrichshafen fault code 015 mean?

Preliminary warning: lube oil pressure too low.. Remedy: Check oil level, top up as necessary (— Page 146)..

What does MTU Friedrichshafen fault code 016 mean?

Lube oil pressure too low (2nd limit value). Remedy: Check engine-oil level and top up, if required automatic engine shutdown Try to re-start the engine Contact Service..

What does MTU Friedrichshafen fault code 019 mean?

HI T-Exhaust A. Remedy: Check cabling (→ Page 155)..

What does MTU Friedrichshafen fault code 020 mean?

SS T-Exhaust A. Remedy: Contact Service..

What does MTU Friedrichshafen fault code 021 mean?

HI T-Exhaust B. Remedy: Check cabling (→ Page 155)..

What does MTU Friedrichshafen fault code 022 mean?

SS T-Exhaust B. Remedy: Contact Service..

What does MTU Friedrichshafen fault code 023 mean?

Engine coolant level too low LEVEL (— Page 153). Remedy: Check coolant level and top up, if required.

What does MTU Friedrichshafen fault code 024 mean?

SS Coolant Level. Remedy: Check coolant level..

What does MTU Friedrichshafen fault code 025 mean?

HI P-Diff. Lube Oil. Remedy: Replace oil filter (— Page 173)..

What does MTU Friedrichshafen fault code 026 mean?

HI P-Diff. Lube Oil. Remedy: Replace oil filter (— Page 173)..

What does MTU Friedrichshafen fault code 027 mean?

HI Leak Fuel Level. Remedy: 1. Check fuel system. 2. Contact Service..

What does MTU Friedrichshafen fault code 029 mean?

HI ETC 2 idle speed. Remedy: Contact Service..

What does MTU Friedrichshafen fault code 030 mean?

Engine overspeed; automatic engine shutdown. Remedy: Acknowledge alarm. Try to re-start the engine Contact Service..

What does MTU Friedrichshafen fault code 031 mean?

HI ETC 1 overspeed. Remedy: Contact Service..