Scania EMS DTC 4165 SCR system compressed air supply

EMS Engine Management System · Scania · 2 variants

Code 4165 (decimal). Some diagnostic tools show it in hexadecimal as 1045.

In short

The SCR system compressed air supply is not sufficient to allow the SCR system to start.

Variant 1

Applies to: EMS S6

What does Scania EMS fault code 4165 mean?

What causes Scania DTC 4165?

How does the system react?

How to fix Scania EMS fault code 4165?

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Variant 2: Exhaust emission control system (EEC)

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 4165 in other Scania systems

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