Scania fault code 12800

Code 12800 is used by 4 different Scania systems. Choose the control unit shown in your diagnostic tool:

EMS Engine Management System Battery voltage The battery voltage has been above the permitted level. It has been 47 V or more for 0.2 seconds. Read explanation → COO Coordinator Charging lamp Conflicting signals in the charging lamp circuit. The fault code is generated: - if the lamp comes on even though coordinator pin 4 measures 0 V (grounding signal) - if the lamp go… Read explanation → OCS Lambda sensor T137 upstream of the catalytic converter Fault in lambda sensor heating. Read explanation → OCE Lambda sensor T137 upstream of the catalytic converter Fault in lambda sensor heating. Read explanation →