Scania EMS DTC 43378 SCR - NOx sensor before catalytic converter

EMS Engine Management System · Scania

Code 43378 (decimal). Some diagnostic tools show it in hexadecimal as A972.

In short

The NOx sensor has detected an open circuit and sends a message to the SCR control unit.

Applies to: EMS S6

What does Scania EMS fault code 43378 mean?

What causes Scania DTC 43378?

How does the system react?

How to fix Scania EMS fault code 43378?

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