Scania EMO DTC 4489 Mass flow sensor T126

EMO EMO control unit · Scania

Code 4489 (decimal). Some diagnostic tools show it in hexadecimal as 1189.

In short

The engine control unit calculates that less air is coming into the engine than what is measured by the mass flow sensor.

Applies to: EMO2 (EMS)

What does Scania EMO fault code 4489 mean?

What causes Scania DTC 4489?

How does the system react?

How to fix Scania EMO fault code 4489?

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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.

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