Scania EMD DTC 4491 Safety valve

EMD EMD control unit · Scania · 2 variants

Code 4491 (decimal). Some diagnostic tools show it in hexadecimal as 118B.

In short

The safety valve has been triggered.

Variant 1

Applies to: EMD0

What does Scania EMD fault code 4491 mean?

What causes Scania DTC 4491?

How does the system react?

How to fix Scania EMD fault code 4491?

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Variant 2

Applies to: EMD1

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

Code 4491 in other Scania systems

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