Scania EMS DTC 17 Cam phaser for intake valve, position fault

EMS Engine Management System · Scania

Code 17 (decimal). Some diagnostic tools show it in hexadecimal as 000011.

In short

Intake valve cam phaser cannot hold the reference position.

Applies to: EMS10

What does Scania EMS fault code 17 mean?

Intake valve cam phaser cannot hold the reference position.

What causes Scania DTC 17?

- Fault in the actuator. - Contaminated oil. - Oil pressure or supply to the cam phaser too low. - Debris in the cam phaser or control valve. - The control valve does not work - The torsion spring has come loose from the mounting point. - Fault with the cam phaser.

What are the symptoms?

- The engine performance is affected. - Decompression braking performance may be affected. - May cause engine noise.

How to fix Scania EMS fault code 17?

  1. Check if there are other fault codes relating to the actuator.
  2. Check that the engine has sufficient oil pressure and that the oil is not contaminated.
  3. Visually check that the electric actuator is moving correctly.
  4. Visually check that the cam phaser control valve moves smoothly and does not jam in any position.
  5. See WSM > 01 Engine > 01-01 Cylinder Head > Cylinder Head [DOHC].
  6. Visually check that the torsion spring on the cam phaser is in the correct position.
  7. See WSM > 01 Engine > 01-01 Cylinder Head > Cylinder Head [DOHC].
  8. After repair, verify by running a cam phaser operational test.
  9. Renew the cam phaser and control valve if the fault persists.

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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