Scania EMS DTC 49423 Control units EMS and EEC

EMS Engine Management System · Scania · 2 variants

Code 49423 (decimal). Some diagnostic tools show it in hexadecimal as C10F.

In short

The engine control unit EMS and the EEC control unit for exhaust gas aftertreatment are not compatible. They indicate different version codes.

Variant 1

Applies to: EMS S8EMS S8 (S8PDE)

What does Scania EMS fault code 49423 mean?

The engine control unit EMS and the EEC control unit for exhaust gas aftertreatment are not compatible. They indicate different version codes.

What causes Scania DTC 49423?

Incompatible software or hardware versions.

How does the system react?

The fault may result in higher exhaust emissions.

How to fix Scania EMS fault code 49423?

  1. Check that the software versions in the control units are compatible.
  2. Check that the hardware versions for the control units are compatible.

Variant 2: EEC control unit and engine control unit E44, different version numbers

Applies to: EMS10

Detection

The EEC control unit and the EMS control unit display different version numbers.

Possible cause

- Incompatible software versions in the EEC control unit and the EMS control unit. - Incompatible hardware in the EEC control unit and the EMS control unit.

Symptoms

The fault can cause increased emissions.

How to fix

  1. Check and update the software for the EEC control unit and the EMS control unit.
  2. Check the version numbers of the EEC control unit and EMS control unit and refer to the parts catalog if it is correct for your vehicle.

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

Code 49423 in other Scania systems

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