MTU 16V4000C21 - Page 67

Flash-
ing
code
PID SID FMI Description Maintenance tasks
73 226 11 Transmission idling switch
defective, (ESS transmis-
sion).
Contact Service.
73 227 2 Analog auxiliary input: data
failing irregularly or defective
(ESS transmission).
Contact Service.
73 227 3 Analog auxiliary input 1, volt-
age too high (ESS transmis-
sion).
Contact Service.
73 227 4 Analog auxiliary input 1, volt-
age too low (ESS transmis-
sion).
Contact Service.
74 70 4 Optimized idle security loop)
ground short circuit.
Contact Service.
74 99 0 Oil filter badly clogged. 1. Replace oil filter (→ Page 113)
2. Contact Service.
75 168 0 ECM battery voltage too
high.
Contact Service.
75 214 0 Real-time clock backup, bat-
tery voltage too high (version
29.0 or later).
Contact Service.
75 232 0 Sensor supply voltage too
high.
Contact Service.
76 121 0 Engine overspeed with ex-
haust brake.
Contact Service.
77 3 0 Cylinder head temperature
too high.
Contact Service.
77 19 0 High range: oil pressure too
high.
Contact Service.
77 20 0 High range: coolant pressure
too high.
Contact Service.
77 72 0 Blower bypass position too
high.
Contact Service.
77 72 1 Blower bypass position too
low.
Contact Service.
77 73 1 Fire pump pressure too low. Contact Service.
77 81 0 Exhaust back pressure too
high.
Contact Service.
77 81 1 Exhaust back pressure too
low.
Contact Service.
77 81 3 Exhaust back pressure sen-
sor voltage too high.
Contact Service.
77 81 4 Exhaust back pressure sen-
sor voltage too low.
Contact Service.
77 81 12 Exhaust back pressure near
limit for power reduction.
Contact Service.
MS150049/04E 2017-04 | Troubleshooting | 67
TIM-ID: 0000003162 - 002