Scania EMS DTC 54020 Fuel supply to cylinders

EMS Engine Management System · Scania · 2 variants

Code 54020 (decimal). Some diagnostic tools show it in hexadecimal as D304.

In short

Voltage too low for controlling the solenoid valve for the fuel quantity to the front bank, cylinders 1-3.

Variant 1

Applies to: EMS S6

What does Scania EMS fault code 54020 mean?

What causes Scania DTC 54020?

How does the system react?

How to fix Scania EMS fault code 54020?

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Variant 2

Applies to: EMS S6 (EMS S6 EuroIII)

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