Scania EMO DTC 564 Turbocharger

EMO EMO control unit · Scania

Code 564 (decimal). Some diagnostic tools show it in hexadecimal as 0234.

In short

Actual charge air pressure is above the requested charge air pressure by more than the permitted tolerance.

Applies to: EMO2 (EMS)

What does Scania EMO fault code 564 mean?

Actual charge air pressure is above the requested charge air pressure by more than the permitted tolerance.

What causes Scania DTC 564?

Possible causes: - Blocked EGR cooler, for example due to leaking coolant or a large quantity of soot. - The EGR damper is stuck in the closed position. - Mass flow sensor adaptation incorrectly has values that are too high. - Incorrect values from exhaust gas pressure sensor T125, charge air pressure sensor T122, charge air temperature sensor T121 or mass flow sensor T126. - Fault in the turbocharger, wastegate valve or variable geometry turbocharger control. - Leakage in the exhaust system downstream of the turbocharger. - Too much fuel injected. - Engine running on engine oil, i.e. leakage.

How does the system react?

Yellow engine warning indication is displayed.

What are the symptoms?

Can result in increased fuel consumption.

How to fix Scania EMO fault code 564?

  1. Visually check the EGR cooler using an endoscope.
  2. If there is a fault in the EGR cooler, the cause of the fault must be investigated and rectified.
  3. Check that the EGR valve can move freely and closes properly.
  4. Check the charge air pressure sensor with the ignition on and the engine off.
  5. To check whether there is a fault in the mass flow sensor adaptation:
  6. Check for leaks between the mass flow sensor and the compressor.
  7. Check the exhaust gas pressure sensor, charge air pressure sensor, charge air temperature sensor and mass flow sensor.
  8. Check the turbocharger and its electric motor.
  9. Check for leaks between the turbocharger and the compressor.
  10. Check for other fault codes related to the injectors and rectify them.
  11. Check engine oil consumption.

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

Code 564 in other Scania systems

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