Scania EMS DTC 4157 Pressure in the SCR system

EMS Engine Management System · Scania · 2 variants

Code 4157 (decimal). Some diagnostic tools show it in hexadecimal as 103D.

In short

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

Variant 1

Applies to: EMS S6

What does Scania EMS fault code 4157 mean?

What causes Scania DTC 4157?

How does the system react?

How to fix Scania EMS fault code 4157?

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Variant 2: SCR main unit

Applies to: EMS S8

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

Code 4157 in other Scania systems