Scania fault code 549
Code 549 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 5.
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
The voltage in the circuit for the retarder lever or for the auxiliary brake lever has been above the permitted level.
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ELC Electronically controlled air suspension
Voltage supply for solenoid valve.
Open circuit or too low current consumption in circuit.
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CUV Visibility system
Trailer brake lights
Current consumption on the control unit output has exceeded 8 A for one second.
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BCI
Configuration fault, Expansion unit H
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
No communication with MMS when vehicle is alarmed.
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CMS
Communication error, DDU or ICL
CAN communication with the instrument cluster or DDU control unit is broken.
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ALM
Micro switch lower storage compartment passenger side (truck)/micro switch A9 (bus), short circuit
The micro switch is short-circuited to earth.
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EST
Motor pump unit
Implausible value.
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ESTA
Motor pump unit
Implausible value.
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