Scania fault code 4821

Code 4821 is used by 4 different Scania systems. Choose the control unit shown in your diagnostic tool:

EMS Engine Management System Fault in the exhaust gas aftertreatment management system; a yellow warning indication is displayed The control unit has received an error message from EEC control unit E67. Read explanation → EMD Ignition module, timeout The OCS control unit detects a fault and forwards the information to the EMS control unit. Read explanation → EME Ignition module, timeout The OCS control unit detects a fault and forwards the information to the EMS control unit. Read explanation → EMO Ignition module, timeout The OCS control unit detects a fault and forwards the information to the EMS control unit. Read explanation →