Scania fault code 550
Code 550 is used by 11 different Scania systems. Choose the control unit shown in your diagnostic tool:
EMS Engine Management System
Post injection ontime too long, cylinder 6.
The error is detected when the post injection ontime, for either post1 or post2, has been consequtively too long for a period of time.
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VDT
Output signal
Invalid configuration.
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COO Coordinator
Manual activation of retarder lever
The voltage in the circuit for the retarder lever or for the auxiliary brake lever has assumed an inadmissible value. The voltage value does not correspond to a permitted switch po…
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ELC Electronically controlled air suspension
Voltage supply for solenoid valve.
The voltage on the output to the solenoid valve has been too low.
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CUV Visibility system
Parking light
Current consumption on the control unit output has exceeded 0.5 A for one second.
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BCI
Configuration fault, Expansion unit I
The expansion unit is responding, but does not exist according to the vehicle configuration.
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LAS Locking and Alarm System
Motion sensor in the cab
The motion sensor sensitivity level is faulty.
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ICL Instrument Cluster
External instrument lighting
Instrument cluster has no grounding.
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ALM
Micro switch lower storage area passenger side (truck)/micro switch A9 (bus), open circuit
Open circuit in the micro switch.
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EST
Motor pump unit
The fault code is activated when the motor pump unit has overheated or cannot turn.
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ESTA
Motor pump unit
The fault code is activated when the motor pump unit has overheated or cannot turn.
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