Scania EMS DTC 42255 Pressure in the SCR system

EMS Engine Management System · Scania

Code 42255 (decimal). Some diagnostic tools show it in hexadecimal as A50F.

In short

The pressure in the SCR system is implausible in comparison with the atmospheric pressure.

Applies to: EMS S6

What does Scania EMS fault code 42255 mean?

What causes Scania DTC 42255?

How does the system react?

How to fix Scania EMS fault code 42255?

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This information is for guidance only. Always follow the manufacturer workshop manual and safety procedures; if in doubt, contact an authorised workshop.