Scania EMS DTC 42051 Thawing of reductant in the SCR system

EMS Engine Management System · Scania

Code 42051 (decimal). Some diagnostic tools show it in hexadecimal as A443.

In short

The pressure in the SCR system does not fall as expected when the solenoid valve in the return pipe is opened.

Applies to: EMS S6

What does Scania EMS fault code 42051 mean?

What causes Scania DTC 42051?

How does the system react?

How to fix Scania EMS fault code 42051?

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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.