Scania EMS DTC 5123 Calibration of the mass flow sensor

EMS Engine Management System · Scania · 2 variants

Code 5123 (decimal). Some diagnostic tools show it in hexadecimal as 1403.

In short

Calibration of the mass flow sensor has reached the highest possible calibrated value at one operating point.

Variant 1

Applies to: EMS S6

What does Scania EMS fault code 5123 mean?

What causes Scania DTC 5123?

How does the system react?

How to fix Scania EMS fault code 5123?

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Variant 2: Exhaust brake actuator M4000 – CAN communication

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.

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