Scania EMS DTC 8394 Air pressure in the SCR system

EMS Engine Management System · Scania · 2 variants

Code 8394 (decimal). Some diagnostic tools show it in hexadecimal as 20CA.

In short

The air pressure in the SCR system is lower than it is expected to be during current operational conditions.

Variant 1

Applies to: EMS S6

What does Scania EMS fault code 8394 mean?

What causes Scania DTC 8394?

How does the system react?

How to fix Scania EMS fault code 8394?

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Variant 2

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.