Scania fault code 4809
Code 4809 is used by 4 different Scania systems. Choose the control unit shown in your diagnostic tool:
EMS Engine Management System
Exhaust gas aftertreatment
No communication with NOx sensor T115 downstream of catalytic converter.
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EMD
Exhaust gas aftertreatment
No communication with NOx sensor T115 downstream of catalytic converter.
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EME
Exhaust gas aftertreatment
NOx sensor after catalytic converter.
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EMO
Exhaust gas aftertreatment
No communication with NOx sensor T115 downstream of catalytic converter.
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