Scania EMS DTC 4721 Unit injector for cylinder 7

EMS Engine Management System · Scania · 2 variants

Code 4721 (decimal). Some diagnostic tools show it in hexadecimal as 1271.

In short

It has not taken as long as expected for the control unit to build up the current in the solenoid valve.

Variant 1

Applies to: EMS S6

What does Scania EMS fault code 4721 mean?

What causes Scania DTC 4721?

How does the system react?

How to fix Scania EMS fault code 4721?

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Variant 2: Outdoor temperature sensor T27 or charge air temperature sensor T121

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.

Code 4721 in other Scania systems

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