MTU 12V4000Gx5S Series Operating Instructions Manual page 153

923 – AL_HI2_T_Exh_SCRsys_outl_F1
Cause
The exhaust gas temperature after
SCR outlet 1 / flow 1 at sensor
B85.6 has violated limit value 2.
The exhaust gas temperature is
too high.
924 – AL_HI1_T_Exh_SCRsys_inl_F2
Cause
The exhaust gas temperature
before SCR inlet 2 / flow 2 at
sensor B85.5 has violated limit
value 1. The exhaust gas
temperature is too high.
925 – AL_HI2_T_Exh_SCRsys_inl_F2
Cause
The exhaust gas temperature
before SCR inlet 2 / flow 2 at
sensor B85.5 has violated limit
value 2. The exhaust gas
temperature is too high.
926 – AL_HI1_T_Exh_SCRsys_outl_F2
Cause
The exhaust gas temperature after
SCR outlet 2 / flow 2 at sensor
B85.6 has violated limit value 1.
The exhaust gas temperature is
too high.
927 – AL_HI2_T_Exh_SCRsys_outl_F2
Cause
The exhaust gas temperature after
SCR outlet 2 / flow 2 at sensor
B85.6 has violated limit value 2.
The exhaust gas temperature is
too high.
942 – AL_LO1_NOx_conversion_SCRsys_F1
Cause
The aging compensator for the
NOx setpoint value integrated in
the ECU logic has reached its limit
value. Satisfactory operation of
the A side catalytic converter is
no longer possible.
Corrective action
1. Reduce power.
2. Contact Service.
Corrective action
1. Reduce power.
2. Contact Service.
Corrective action
1. Reduce power.
2. Contact Service.
Corrective action
1. Reduce power.
2. Contact Service.
Corrective action
1. Reduce power.
2. Reduce power.
3. Contact Service.
4. Contact Service.
Corrective action
u Contact Service.
MS15065/01E 2019-01 | Troubleshooting | 151