Scania EMS DTC 4131 Voltage supply for SCR control unit

EMS Engine Management System · Scania · 3 variants

Code 4131 (decimal). Some diagnostic tools show it in hexadecimal as 1023.

In short

The concentration of reductant is too low and the level of nitrogen oxides downstream of the catalytic converter is too high.

Variant 1: Reductant quality too low

Applies to: EMS10

What does Scania EMS fault code 4131 mean?

What causes Scania DTC 4131?

How to fix Scania EMS fault code 4131?

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Variant 2

Applies to: EMS S6

Variant 3: Reductant quality too low

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 4131 in other Scania systems

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