634 – SD T0-Ambient Air (HDT2800)
Cause
Corrective action
The signal from the temperature
sensor (B90) is missing.
u
Contact Service.
635 – SD Air Humidity (HDT2800)
Cause
Corrective action
The signal from the humidity
sensor (B90) is missing.
u
Contact Service.
648 – SD P-Charge Air B
Cause
Corrective action
The signal from the charge-air
pressure sensor (B10.2) after
intercooler on B side is faulty or
missing.
1. Check engine cabling (→ Page 321).
2. Contact Service.
718 – AL Act Intake Air Defect
Cause
Corrective action
Thermal management flap 1
(M58.1) is faulty.
u
Contact Service.
723 – AL_SD_T_Exh_DPFsys_inl_F1
Cause
Corrective action
The signal from the exhaust gas
temperature sensor (B4.33)
before the DOC is faulty or
missing.
1. Check engine cabling (→ Page 321).
2. Contact Service.
724 – SD T-Exhaust DPF Inlet 1
Cause
Corrective action
The signal from the exhaust gas
temperature sensor (B4.31)
before the DPF is faulty or
missing.
1. Check engine cabling (→ Page 321).
2. Contact Service.
726 – AL_SD_dp_Exh_DPFsys_F1
Cause
Corrective action
The signal from the differential
exhaust gas pressure sensor
(B91.2) for the DPF is faulty or
missing.
1. Check engine cabling (→ Page 321).
2. Contact Service.
144 | Troubleshooting | MS15065/01E 2019-01
TIM-ID: 0000078552 - 003
