EMS 4786 Scania Mass flow sensor

EMS Engine Management System · Scania · 2 variants

Code 4786 (decimal). Some diagnostic tools show it in hexadecimal as 12B2.

In short

The mass flow sensor produces too low a value.

Variant 1

Applies to: EMS S7EMS S8

What does Scania EMS fault code 4786 mean?

What causes Scania DTC 4786?

How does the system react?

How to fix Scania EMS fault code 4786?

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Variant 2: Fuel supply to cylinders

Applies to: EMS S6

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